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Test program working

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This commit is contained in:
jaseg 2017-06-11 21:30:02 +02:00
parent 84de029e74
commit 6301aad169
1 changed files with 53 additions and 29 deletions
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82
fw/main.c
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@ -3,6 +3,7 @@
#include <stdint.h>
#include <system_stm32f0xx.h>
#include <stm32f0xx_ll_utils.h>
#include <stm32f0xx_ll_spi.h>
#include <string.h>
#include <unistd.h>
/*
@ -14,12 +15,30 @@ void tick(void) {
__asm__("nop");
}
void spi_send(int data) {
SPI1->DR = data;
while (SPI1->SR & SPI_SR_BSY);
}
void strobe_aux(void) {
GPIOA->BSRR = GPIO_BSRR_BS_10;
tick();
GPIOA->BSRR = GPIO_BSRR_BR_10;
}
void strobe_leds(void) {
GPIOA->BSRR = GPIO_BSRR_BS_9;
tick();
GPIOA->BSRR = GPIO_BSRR_BR_9;
}
int main(void) {
RCC->CR |= RCC_CR_HSEON;
while (!(RCC->CR&RCC_CR_HSERDY));
RCC->CFGR &= ~RCC_CFGR_PLLMUL_Msk & ~RCC_CFGR_SW_Msk;
RCC->CFGR |= (2<<RCC_CFGR_PLLMUL_Pos) | RCC_CFGR_PLLSRC_HSE_PREDIV; /* PLL x4 */
RCC->CFGR2 &= ~RCC_CFGR2_PREDIV_Msk; /* PREDIV=0 */
RCC->CFGR2 &= ~RCC_CFGR2_PREDIV_Msk;
RCC->CFGR2 |= RCC_CFGR2_PREDIV_DIV2;
RCC->CR |= RCC_CR_PLLON;
while (!(RCC->CR&RCC_CR_PLLRDY));
RCC->CFGR |= (2<<RCC_CFGR_SW_Pos);
@ -32,50 +51,55 @@ int main(void) {
GPIOA->MODER |=
(2<<GPIO_MODER_MODER5_Pos) /* PA5 - SCLK */
| (1<<GPIO_MODER_MODER6_Pos) /* PA6 - LED !OE */
| (2<<GPIO_MODER_MODER7_Pos) /* PA7 - MOSI */
| (1<<GPIO_MODER_MODER9_Pos) /* PA9 - LED strobe */
| (1<<GPIO_MODER_MODER10_Pos);/* PA10 - Auxiliary strobe */
/* Set shift register IO GPIO output speed */
GPIOA->OSPEEDR |=
(3<<GPIO_OSPEEDR_OSPEEDR5_Pos) /* SCLK */
| (3<<GPIO_OSPEEDR_OSPEEDR7_Pos) /* MOSI */
| (3<<GPIO_OSPEEDR_OSPEEDR9_Pos) /* LED strobe */
| (3<<GPIO_OSPEEDR_OSPEEDR10_Pos); /* Auxiliary strobe */
(2<<GPIO_OSPEEDR_OSPEEDR5_Pos) /* SCLK FIXME maybe try 0x2 here? */
| (2<<GPIO_OSPEEDR_OSPEEDR6_Pos) /* LED !OE */
| (2<<GPIO_OSPEEDR_OSPEEDR7_Pos) /* MOSI */
| (2<<GPIO_OSPEEDR_OSPEEDR9_Pos) /* LED strobe */
| (2<<GPIO_OSPEEDR_OSPEEDR10_Pos); /* Auxiliary strobe */
GPIOA->AFR[0] |=
(0<<GPIO_AFRL_AFRL5_Pos) /* SPI1_SCK */
| (0<<GPIO_AFRL_AFRL7_Pos); /* SPI1_MOSI */
/* Configure SPI controller */
SPI1->CR1 = SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_SPE | (7<<SPI_CR1_BR_Pos) | SPI_CR1_MSTR;
SPI1->CR2 = (7<<SPI_CR2_DS_Pos);
int pos1 = 0;
int pos2 = 0;
SPI1->I2SCFGR = 0;
SPI1->CR2 &= ~SPI_CR2_DS_Msk;
SPI1->CR2 &= ~SPI_CR2_DS_Msk;
SPI1->CR2 |= LL_SPI_DATAWIDTH_16BIT;
/* FIXME maybe try w/o BIDI */
SPI1->CR1 = SPI_CR1_BIDIMODE | SPI_CR1_BIDIOE | SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_SPE | (1<<SPI_CR1_BR_Pos) | SPI_CR1_MSTR | SPI_CR1_CPOL | SPI_CR1_CPHA;
int i = 0;
int val = 0x5555;
GPIOA->BSRR = GPIO_BSRR_BR_6;
while (42) {
for (int i=0; i<6; i++) {
if (pos1 == i) {
SPI1->DR = 1<<pos2;
} else {
SPI1->DR = 0;
}
while (SPI1->SR & SPI_SR_BSY);
tick();
if (i == 8) {
i = 0;
val = ~val;
}
pos2 += 1;
if (pos2 == 8) {
pos2 = 0;
pos1 += 1;
if (pos1 == 6)
pos1 = 0;
spi_send((i&1 ? 0xfa00 : 0xf000) | (0xff^(1<<i)));
i++; // 1100'0100"0000'0000
strobe_aux();
spi_send(val);
spi_send(val);
strobe_leds();
/*if (i == 32) {
i = 0;
}
/* Strobe both LED drivers and aux regs */
GPIOA->BSRR = GPIO_BSRR_BS_9 | GPIO_BSRR_BS_10;
tick();
GPIOA->BSRR = GPIO_BSRR_BR_9 | GPIO_BSRR_BR_10;
LL_mDelay(1);
i++;
spi_send((i&16) ? 0 : (1<<i));
spi_send((i&16) ? (1<<(i&15)) : 0);
strobe_leds();
*/
LL_mDelay(200);
}
}