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Rework I2C peripheral check

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This commit is contained in:
Hierophect 2019-09-18 13:42:54 -04:00
parent 69a0bfaf34
commit d60ecc5e3d
1 changed files with 39 additions and 41 deletions
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64
ports/stm32f4/common-hal/busio/I2C.c
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@ -34,52 +34,50 @@
#include "supervisor/shared/translate.h"
#include "stm32f4/periph.h"
I2C_HandleTypeDef hi2c;
STATIC I2C_HandleTypeDef hi2c;
STATIC I2C_TypeDef * I2Cbanks[3] =
{
#ifdef I2C1
I2C1,
#else
NULL,
#endif
#ifdef I2C2
I2C2,
#else
NULL,
#endif
#ifdef I2C3
I2C3
#else
NULL
#endif
};
void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
const mcu_pin_obj_t* scl, const mcu_pin_obj_t* sda, uint32_t frequency, uint32_t timeout) {
//TODO: Rework this entire section to use LL so we can properly assign pins
// This will also be bundled with MSP removal
I2C_TypeDef * I2Cx = NULL;
I2C_TypeDef * I2Cx_check = NULL;
for(uint i=0; i<(sizeof(mcu_i2c_list)/sizeof(*mcu_i2c_list));i++) {
uint8_t i2cidx = 0;
uint8_t i2cidx_c = 0;
uint8_t len = sizeof(mcu_i2c_list)/sizeof(*mcu_i2c_list);
for(uint i=0; i<len;i++) {
if (mcu_i2c_list[i]->sda_pin == sda) {
switch (mcu_i2c_list[i]->i2c_index) {
case 1: I2Cx = I2C1;
break;
#ifdef I2C2
case 2: I2Cx = I2C2;
break;
#endif
#ifdef I2C3
case 3: I2Cx = I2C3;
break;
#endif
i2cidx = mcu_i2c_list[i]->i2c_index;
}
}
if (mcu_i2c_list[i]->scl_pin == scl) {
switch (mcu_i2c_list[i]->i2c_index) {
case 1: I2Cx_check = I2C1;
break;
#ifdef I2C2
case 2: I2Cx_check = I2C2;
break;
#endif
#ifdef I2C3
case 3: I2Cx_check = I2C3;
break;
#endif
i2cidx_c = mcu_i2c_list[i]->i2c_index
}
}
if(idcidx == i2cidx_c) {
if(I2Cbanks[idcidx] == NULL || idcidx>=len) {
mp_raise_RuntimeError(translate("Bad I2C pin definition, check peripheral files"));
}
if (I2Cx!=I2Cx_check || I2Cx==NULL) {
I2Cx = I2Cbanks[idcidx];
} else {
mp_raise_RuntimeError(translate("Invalid I2C pin selection"));
}
hi2c.Instance = I2Cx;
hi2c.Init.ClockSpeed = 100000;
hi2c.Init.DutyCycle = I2C_DUTYCYCLE_2;