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@@ -213,8 +213,9 @@ volatile unsigned int *_wiringPiTimerIrqRaw ; |
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// piGpioBase: |
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// The base address of the GPIO memory mapped hardware IO |
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#define GPIO_PERI_BASE_OLD 0x20000000 |
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#define GPIO_PERI_BASE_NEW 0x3F000000 |
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#define GPIO_PERI_BASE_OLD 0x20000000 |
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#define GPIO_PERI_BASE_2835 0x3F000000 |
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#define GPIO_PERI_BASE_2711 0xFE000000 |
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static volatile unsigned int piGpioBase = 0 ; |
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@@ -237,7 +238,7 @@ const char *piModelNames [20] = |
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"Pi 3A+", // 14 |
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"Unknown15", // 15 |
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"CM3+", // 16 |
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"Unknown17", // 17 |
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"Pi 4B", // 17 |
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"Unknown18", // 18 |
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"Unknown19", // 19 |
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} ; |
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@@ -542,6 +543,14 @@ static uint8_t gpioToFEN [] = |
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#define GPPUD 37 |
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/* 2711 has a different mechanism for pin pull-up/down/enable */ |
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#define GPPUPPDN0 57 /* Pin pull-up/down for pins 15:0 */ |
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#define GPPUPPDN1 58 /* Pin pull-up/down for pins 31:16 */ |
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#define GPPUPPDN2 59 /* Pin pull-up/down for pins 47:32 */ |
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#define GPPUPPDN3 60 /* Pin pull-up/down for pins 57:48 */ |
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static volatile unsigned int piGpioPupOffset = 0 ; |
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// gpioToPUDCLK |
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// (Word) offset to the Pull Up Down Clock regsiter |
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@@ -818,7 +827,7 @@ int piGpioLayout (void) |
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for (c = &line [strlen (line) - 1] ; (*c == '\n') || (*c == '\r') ; --c) |
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*c = 0 ; |
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if (wiringPiDebug) |
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printf ("piGpioLayout: Revision string: %s\n", line) ; |
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@@ -887,7 +896,7 @@ int piBoardRev (void) |
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* So the distinction between boards that I can see is: |
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* |
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* 0000 - Error |
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* 0001 - Not used |
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* 0001 - Not used |
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* |
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* Original Pi boards: |
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* 0002 - Model B, Rev 1, 256MB, Egoman |
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@@ -972,7 +981,7 @@ void piBoardId (int *model, int *rev, int *mem, int *maker, int *warranty) |
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for (c = &line [strlen (line) - 1] ; (*c == '\n') || (*c == '\r') ; --c) |
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*c = 0 ; |
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if (wiringPiDebug) |
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printf ("piBoardId: Revision string: %s\n", line) ; |
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@@ -1011,7 +1020,7 @@ void piBoardId (int *model, int *rev, int *mem, int *maker, int *warranty) |
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bMfg = (revision & (0x0F << 16)) >> 16 ; |
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bMem = (revision & (0x07 << 20)) >> 20 ; |
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bWarranty = (revision & (0x03 << 24)) != 0 ; |
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*model = bType ; |
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*rev = bRev ; |
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*mem = bMem ; |
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@@ -1038,7 +1047,7 @@ void piBoardId (int *model, int *rev, int *mem, int *maker, int *warranty) |
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// If longer than 4, we'll assume it's been overvolted |
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*warranty = strlen (c) > 4 ; |
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// Extract last 4 characters: |
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c = c + strlen (c) - 4 ; |
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@@ -1078,7 +1087,7 @@ void piBoardId (int *model, int *rev, int *mem, int *maker, int *warranty) |
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else { *model = 0 ; *rev = 0 ; *mem = 0 ; *maker = 0 ; } |
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} |
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} |
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/* |
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@@ -1264,7 +1273,7 @@ void gpioClockSet (int pin, int freq) |
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pin = physToGpio [pin] ; |
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else if (wiringPiMode != WPI_MODE_GPIO) |
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return ; |
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divi = 19200000 / freq ; |
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divr = 19200000 % freq ; |
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divf = (int)((double)divr * 4096.0 / 19200000.0) ; |
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@@ -1508,11 +1517,36 @@ void pullUpDnControl (int pin, int pud) |
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else if (wiringPiMode != WPI_MODE_GPIO) |
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return ; |
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*(gpio + GPPUD) = pud & 3 ; delayMicroseconds (5) ; |
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*(gpio + gpioToPUDCLK [pin]) = 1 << (pin & 31) ; delayMicroseconds (5) ; |
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*(gpio + GPPUD) = 0 ; delayMicroseconds (5) ; |
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*(gpio + gpioToPUDCLK [pin]) = 0 ; delayMicroseconds (5) ; |
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if (piGpioPupOffset == GPPUPPDN0) |
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{ |
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// Pi 4B pull up/down method |
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int pullreg = GPPUPPDN0 + (pin>>4); |
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int pullshift = (pin & 0xf) << 1; |
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unsigned int pullbits; |
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unsigned int pull; |
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switch (pud) |
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{ |
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case PUD_OFF: pull = 0; break; |
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case PUD_UP: pull = 1; break; |
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case PUD_DOWN: pull = 2; break; |
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default: return ; /* An illegal value */ |
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} |
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pullbits = *(gpio + pullreg); |
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pullbits &= ~(3 << pullshift); |
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pullbits |= (pull << pullshift); |
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*(gpio + pullreg) = pullbits; |
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} |
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else |
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{ |
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// legacy pull up/down method |
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*(gpio + GPPUD) = pud & 3 ; delayMicroseconds (5) ; |
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*(gpio + gpioToPUDCLK [pin]) = 1 << (pin & 31) ; delayMicroseconds (5) ; |
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*(gpio + GPPUD) = 0 ; delayMicroseconds (5) ; |
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*(gpio + gpioToPUDCLK [pin]) = 0 ; delayMicroseconds (5) ; |
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} |
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} |
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else // Extension module |
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{ |
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@@ -1533,7 +1567,6 @@ int digitalRead (int pin) |
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{ |
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char c ; |
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struct wiringPiNodeStruct *node = wiringPiNodes ; |
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if ((pin & PI_GPIO_MASK) == 0) // On-Board Pin |
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{ |
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/**/ if (wiringPiMode == WPI_MODE_GPIO_SYS) // Sys mode |
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@@ -1684,7 +1717,7 @@ void pwmWrite (int pin, int value) |
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/* |
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* analogRead: |
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* Read the analog value of a given Pin. |
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* Read the analog value of a given Pin. |
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* There is no on-board Pi analog hardware, |
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* so this needs to go to a new node. |
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********************************************************************************* |
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@@ -1703,7 +1736,7 @@ int analogRead (int pin) |
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/* |
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* analogWrite: |
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* Write the analog value to the given Pin. |
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* Write the analog value to the given Pin. |
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* There is no on-board Pi analog hardware, |
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* so this needs to go to a new node. |
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********************************************************************************* |
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@@ -1752,7 +1785,7 @@ void pwmToneWrite (int pin, int freq) |
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* Write an 8-bit byte to the first 8 GPIO pins - try to do it as |
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* fast as possible. |
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* However it still needs 2 operations to set the bits, so any external |
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* hardware must not rely on seeing a change as there will be a change |
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* hardware must not rely on seeing a change as there will be a change |
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* to set the outputs bits to zero, then another change to set the 1's |
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* Reading is just bit fiddling. |
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* These are wiringPi pin numbers 0..7, or BCM_GPIO pin numbers |
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@@ -1808,7 +1841,7 @@ unsigned int digitalReadByte (void) |
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data = (data << 1) | x ; |
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} |
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} |
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else |
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else |
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{ |
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raw = *(gpio + gpioToGPLEV [0]) ; // First bank for these pins |
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for (pin = 0 ; pin < 8 ; ++pin) |
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@@ -1865,7 +1898,7 @@ unsigned int digitalReadByte2 (void) |
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data = (data << 1) | x ; |
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} |
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} |
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else |
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else |
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data = ((*(gpio + gpioToGPLEV [0])) >> 20) & 0xFF ; // First bank for these pins |
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return data ; |
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@@ -2243,7 +2276,9 @@ int wiringPiSetup (void) |
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piBoardId (&model, &rev, &mem, &maker, &overVolted) ; |
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if ((model == PI_MODEL_CM) || (model == PI_MODEL_CM3) || (model == PI_MODEL_CM3P)) |
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if ((model == PI_MODEL_CM) || |
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(model == PI_MODEL_CM3) || |
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(model == PI_MODEL_CM3P)) |
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wiringPiMode = WPI_MODE_GPIO ; |
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else |
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wiringPiMode = WPI_MODE_PINS ; |
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@@ -2268,16 +2303,23 @@ int wiringPiSetup (void) |
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case PI_ALPHA: case PI_MODEL_CM: |
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case PI_MODEL_ZERO: case PI_MODEL_ZERO_W: |
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piGpioBase = GPIO_PERI_BASE_OLD ; |
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piGpioPupOffset = GPPUD ; |
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break ; |
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case PI_MODEL_4B: |
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piGpioBase = GPIO_PERI_BASE_2711 ; |
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piGpioPupOffset = GPPUPPDN0 ; |
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break ; |
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default: |
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piGpioBase = GPIO_PERI_BASE_NEW ; |
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piGpioBase = GPIO_PERI_BASE_2835 ; |
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piGpioPupOffset = GPPUD ; |
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break ; |
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} |
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// Open the master /dev/ memory control device |
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// Device strategy: December 2016: |
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// Try /dev/mem. If that fails, then |
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// Try /dev/mem. If that fails, then |
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// try /dev/gpiomem. If that fails then game over. |
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if ((fd = open ("/dev/mem", O_RDWR | O_SYNC | O_CLOEXEC)) < 0) |
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@@ -2315,13 +2357,13 @@ int wiringPiSetup (void) |
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pwm = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIO_PWM) ; |
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if (pwm == MAP_FAILED) |
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return wiringPiFailure (WPI_ALMOST, "wiringPiSetup: mmap (PWM) failed: %s\n", strerror (errno)) ; |
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// Clock control (needed for PWM) |
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clk = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIO_CLOCK_BASE) ; |
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if (clk == MAP_FAILED) |
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return wiringPiFailure (WPI_ALMOST, "wiringPiSetup: mmap (CLOCK) failed: %s\n", strerror (errno)) ; |
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// The drive pads |
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pads = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIO_PADS) ; |
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@@ -2441,7 +2483,7 @@ int wiringPiSetupSys (void) |
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// Open and scan the directory, looking for exported GPIOs, and pre-open |
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// the 'value' interface to speed things up for later |
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for (pin = 0 ; pin < 64 ; ++pin) |
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{ |
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sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ; |
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