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Merge pull request #70 from steveb/master 

Add support for Raspberry Pi 4B
This commit is contained in:
Mark Liffiton 2019-12-29 20:23:09 -06:00 committed by GitHub
parent 03e88aef04 9aed9a4415
commit 16a23e3688
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 80 additions and 34 deletions
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2
VERSION
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@ -1 +1 @@
2.50
2.60

7
gpio/readall.c
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@ -80,7 +80,7 @@ static char *alts [] =
"IN", "OUT", "ALT5", "ALT4", "ALT0", "ALT1", "ALT2", "ALT3"
} ;
static int physToWpi [64] =
static int physToWpi [64] =
{
-1, // 0
-1, -1, // 1, 2
@ -113,7 +113,7 @@ static int physToWpi [64] =
-1, -1, -1, -1, -1, -1, -1, -1, -1
} ;
static char *physNames [64] =
static char *physNames [64] =
{
NULL,
@ -309,6 +309,8 @@ static void plus2header (int model)
printf (" +-----+-----+---------+------+---+---Pi 3B+-+---+------+---------+-----+-----+\n") ;
else if (model == PI_MODEL_3AP)
printf (" +-----+-----+---------+------+---+---Pi 3A+-+---+------+---------+-----+-----+\n") ;
else if (model == PI_MODEL_4B)
printf (" +-----+-----+---------+------+---+---Pi 4B--+---+------+---------+-----+-----+\n") ;
else
printf (" +-----+-----+---------+------+---+---Pi ?---+---+------+---------+-----+-----+\n") ;
}
@ -356,6 +358,7 @@ void doReadall (void)
(model == PI_MODEL_2) ||
(model == PI_MODEL_3AP) ||
(model == PI_MODEL_3B) || (model == PI_MODEL_3BP) ||
(model == PI_MODEL_4B) ||
(model == PI_MODEL_ZERO) || (model == PI_MODEL_ZERO_W))
piPlusReadall (model) ;
else if ((model == PI_MODEL_CM) || (model == PI_MODEL_CM3) || ((model == PI_MODEL_CM3P)))

4
version.h
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@ -1,3 +1,3 @@
#define VERSION "2.50"
#define VERSION "2.60"
#define VERSION_MAJOR 2
#define VERSION_MINOR 50
#define VERSION_MINOR 60

96
wiringPi/wiringPi.c
View File

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

5
wiringPi/wiringPi.h
View File

@ -102,6 +102,7 @@
#define PI_MODEL_3BP 13
#define PI_MODEL_3AP 14
#define PI_MODEL_CM3P 16
#define PI_MODEL_4B 17
#define PI_VERSION_1 0
#define PI_VERSION_1_1 1
@ -134,7 +135,7 @@ extern const int piMemorySize [ 8] ;
// wiringPiNodeStruct:
// This describes additional device nodes in the extended wiringPi
// 2.0 scheme of things.
// It's a simple linked list for now, but will hopefully migrate to
// It's a simple linked list for now, but will hopefully migrate to
// a binary tree for efficiency reasons - but then again, the chances
// of more than 1 or 2 devices being added are fairly slim, so who
// knows....
@ -211,7 +212,7 @@ extern void pwmWrite (int pin, int value) ;
extern int analogRead (int pin) ;
extern void analogWrite (int pin, int value) ;
// PiFace specifics
// PiFace specifics
// (Deprecated)
extern int wiringPiSetupPiFace (void) ;