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add SPI, not working yet (also need to set SPOL/SPHA etc)

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This commit is contained in:
Edward Emelianov
2026-03-17 23:57:08 +03:00
parent 165780bef9
commit c80f0884f5
13 changed files with 273 additions and 30 deletions
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116
F0:F030,F042,F072/usbcan_gpio/gpio.c
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@@ -24,6 +24,7 @@
#include "gpio.h"
#include "i2c.h"
#include "pwm.h"
#include "spi.h"
#include "usart.h"
static uint16_t monitor_mask[2] = {0}; // pins to monitor == 1 (ONLY GPIO and ADC)
@@ -83,6 +84,7 @@ static const pinprops_t pin_props[2][16] = {
#define CANPWM(x) ((x) & (1<<FUNC_PWM))
static uint8_t haveI2C = 0; // ==1 if chkpinconf found I2C
static uint8_t haveSPI = 0;
// return pin_props[port][pin].funcs for listing or -1 if disabled
int pinfuncs(uint8_t port, uint8_t pin){
@@ -142,7 +144,7 @@ int get_usart_index(uint8_t port, uint8_t pin, usart_props_t *p){
// return -1 if pin can't I2C, or return 0 and fill `p`
int get_i2c_index(uint8_t port, uint8_t pin, i2c_props_t *p){
if(port > 1 || pin > 15 || !CANI2C(pin_props[port][pin].funcs)) return -1;
int idx = -1; // I2C1 is alone
int idx = -1; // later we can add SPI2 support
i2c_props_t curprops = {0};
if(port == 1){ // only GPIOB
switch(pin){
@@ -170,6 +172,47 @@ int get_i2c_index(uint8_t port, uint8_t pin, i2c_props_t *p){
return idx;
}
int get_spi_index(uint8_t port, uint8_t pin, spi_props_t *p){
if(port > 1 || pin > 15 || !CANSPI(pin_props[port][pin].funcs)) return -1;
int idx = -1;
spi_props_t curprops = {0};
if(port == 0){ // PA5-7 (SCK-MISO-MOSI)
switch(pin){
case 5:
idx = 0;
curprops.issck =1;
break;
case 6:
idx = 0;
curprops.ismiso = 1;
break;
case 7:
idx = 0;
curprops.ismosi = 1;
break;
default: break;
}
}else if(port == 1){ // PB3-5 (SCK-MISO-MOSI)
switch(pin){
case 3:
idx = 0;
curprops.issck =1;
break;
case 4:
idx = 0;
curprops.ismiso = 1;
break;
case 5:
idx = 0;
curprops.ismosi = 1;
break;
default: break;
}
}
if(p) *p = curprops;
return idx;
}
// default config
static void defconfig(pinconfig_t *cfg){
if(!cfg) return;
@@ -196,7 +239,9 @@ int chkpinconf(){
}
int active_usart = -1; // number of USART if user selects it (we can't check it by UC->idx)
int active_i2c = -1;
uint8_t i2c_scl_pin = 0xFF, i2c_sda_pin = 0xFF; // to check SCL/SDA collisions and (SCL&SDA)
int active_spi = -1;
i2c_props_t i2cprops = {0};
spi_props_t spiprops = {0};
for(int port = 0; port < 2; ++port){
for(int pin = 0; pin < 16; ++pin){
pinconfig_t *cfg = &pinconfig[port][pin];
@@ -267,20 +312,60 @@ int chkpinconf(){
break;
}
if(ip.isscl){
if(i2c_scl_pin != 0xFF){ // two SCLs
if(i2cprops.isscl){ // two SCLs
defconfig(cfg);
ret = FALSE;
break;
}
i2c_scl_pin = (port << 4) | pin;
i2cprops.isscl = 1;
}
if(ip.issda){
if(i2c_sda_pin != 0xFF){ // two SDAs
if(i2cprops.issda){ // two SDAs
defconfig(cfg);
ret = FALSE;
break;
}
i2c_sda_pin = (port << 4) | pin;
i2cprops.issda = 1;
}
}
break;
case FUNC_SPI:{
spi_props_t sp;
int spi_idx = get_spi_index(port, pin, &sp);
if(spi_idx < 0){
defconfig(cfg);
ret = FALSE;
break;
}
if(active_spi == -1) active_spi = spi_idx;
else if(active_spi != spi_idx){
defconfig(cfg);
ret = FALSE;
break;
}
if(sp.issck){
if(spiprops.issck){
defconfig(cfg);
ret = FALSE;
break;
}
spiprops.issck = 1;
}
if(sp.ismiso){
if(spiprops.ismiso){
defconfig(cfg);
ret = FALSE;
break;
}
spiprops.ismiso = 1;
}
if(sp.ismosi){
if(spiprops.ismosi){
defconfig(cfg);
ret = FALSE;
break;
}
spiprops.ismosi = 1;
}
}
break;
@@ -302,12 +387,23 @@ int chkpinconf(){
}
// check active I2C
if(active_i2c != -1){
if(i2c_scl_pin == 0xFF || i2c_sda_pin == 0xFF){
if(i2cprops.isscl && i2cprops.issda){
haveI2C = 1;
}else{
DBG("Need two pins for I2C\n");
ret = FALSE;
haveI2C = 0;
}else haveI2C = 1;
}else i2c_stop();
}
}
if(active_spi != -1){
if(spiprops.issck && (spiprops.ismiso || spiprops.ismosi)){
haveSPI = 1;
}else{
DBG("SPI needs SCK and MOSI or MISO\n");
ret = FALSE;
haveSPI = 0;
}
}
return ret;
}
@@ -455,6 +551,8 @@ int gpio_reinit(){
}else usart_stop();
if(haveI2C) i2c_setup((i2c_speed_t) the_conf.I2Cspeed);
else i2c_stop();
if(haveSPI) spi_setup(the_conf.SPIspeed);
else spi_stop();
return ret;
}