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Merge remote-tracking branch 'origin/sk6812-assembly-test'

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This commit is contained in:
Mario Hüttel 2021-03-28 22:29:21 +02:00
commit f47631b2cf
4 changed files with 238 additions and 11 deletions
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4
firmware/Makefile
View File

@ -12,7 +12,7 @@ endif
#Add Files and Folders below#########################################################
CFILES = main.c syscalls/syscalls.c setup/system_init.c startup/startup_stm32f0xx.c
ASFILES =
ASFILES = sk6812.S
INCLUDEPATH = -Iinclude -Iinclude/cmsis
OBJDIR=obj
@ -39,7 +39,7 @@ LFLAGS += -mfloat-abi=soft --disable-newlib-supplied-syscalls -nostartfiles
LFLAGS += -Tstartup/stm32f030.ld -Wl,-Map=$(mapfile).map -Wl,--gc-sections -g
CFLAGS = -c -fmessage-length=0 -mlittle-endian -mthumb -mcpu=cortex-m0 -mthumb-interwork
CFLAGS += -mfloat-abi=soft -nostartfiles -Wall -g
CFLAGS += -mfloat-abi=soft -nostartfiles -Wall -g -O3
####################################################################################

158
firmware/main.c
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@ -1,19 +1,165 @@
#include <stm32f0xx.h>
#include <cmsis/core_cm0.h>
#include <stdbool.h>
#define RING_MAX_LED 30u
enum ring_modes {
RING_MODE_ALL,
RING_MODE_RED,
RING_MODE_GREEN,
RING_MODE_BLUE,
RING_MODE_WHITE,
RING_MODE_ARC,
RING_MODE_QUARTER,
RING_MODE_IN_FARBE_UND_BUNT,
RING_MODE_MAX
};
unsigned int i = 0x12345678;
unsigned char c = 2;
int main(void) {
RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
GPIOB->MODER |= (1<<1*2);
GPIOB->ODR |= (1<<1);
extern void sk6812_send_led(uint32_t rgbw);
volatile uint32_t wait_tick = 0;
static void wait_for_ticks(uint32_t ticks)
{
wait_tick = 0;
while (wait_tick < ticks);
}
int main(void)
{
uint32_t led_val = 0x00UL;
uint32_t led_calc_val[RING_MAX_LED] = {0x00UL};
bool button_pressed = false;
enum ring_modes mode = RING_MODE_ALL;
RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
GPIOA->MODER |= (2<<7*2)|(2<<6*2)|(1<<3*2);
/* enable pullups on encoder inputs */
GPIOA->PUPDR |= (1<<7*2)|(1<<6*2)|(1<<0*2);
/* enable TIM3 on encoder inputs */
GPIOA->AFR[0] |= (1<<7*4)|(1<<6*4);
TIM3->ARR = 0xFFFF;
TIM3->CNT = 0;
TIM3->CR2 = 0;
TIM3->SMCR = TIM_SMCR_SMS_0;
TIM3->CCMR1 = TIM_CCMR1_CC1S_0 | TIM_CCMR1_CC2S_1;
TIM3->CCER = TIM_CCER_CC1P | TIM_CCER_CC2P;
TIM3->PSC = 0;
TIM3->CR1 = TIM_CR1_CEN;
SysTick_Config(800000);
while(1) {
i++;
switch (mode)
{
case RING_MODE_ALL:
for(int i = 0; i < RING_MAX_LED; i ++) {
led_calc_val[i] = (led_val << 24) + (led_val << 16) + (led_val << 8) + led_val;
}
break;
case RING_MODE_RED:
for(int i = 0; i < RING_MAX_LED; i ++) {
led_calc_val[i] = led_val << 16;
}
break;
case RING_MODE_GREEN:
for(int i = 0; i < RING_MAX_LED; i ++) {
led_calc_val[i] = led_val << 24;
}
break;
case RING_MODE_BLUE:
for(int i = 0; i < RING_MAX_LED; i ++) {
led_calc_val[i] = led_val << 8;
}
break;
case RING_MODE_WHITE:
for(int i = 0; i < RING_MAX_LED; i ++) {
led_calc_val[i] = led_val;
}
break;
case RING_MODE_ARC:
for(int i = 0; i < RING_MAX_LED; i ++) {
if(led_val > i*8) {
led_calc_val[i] = 0xFFFFFFFFUL;
}
else {
led_calc_val[i] = 0x00000000UL;
}
}
break;
case RING_MODE_QUARTER:
for(int i = 0; i < RING_MAX_LED; i ++) {
if((led_val / 7 > i) && (led_val / 7 < (i + 7))) {
led_calc_val[i] = 0xFFFFFFFFUL;
}
else {
led_calc_val[i] = 0x00000000UL;
}
}
break;
case RING_MODE_IN_FARBE_UND_BUNT:
for(int i = 0; i < RING_MAX_LED; i ++) {
switch ((led_val + (i / 3)) % 3)
{
case 0:
led_calc_val[i] = 0x00FF0000UL;
break;
case 1:
led_calc_val[i] = 0xFF000000UL;
break;
case 2:
led_calc_val[i] = 0x0000FF00UL;
break;
default:
break;
}
}
break;
default:
for(int i = 0; i < RING_MAX_LED; i ++) {
led_calc_val[i] = 0x00000000UL;
}
break;
}
__disable_irq();
for(int i = 0; i < RING_MAX_LED; i ++) {
sk6812_send_led(led_calc_val[i]);
}
__enable_irq();
wait_for_ticks(5);
if((int16_t)TIM3->CNT > (int16_t)led_val) {
led_val = 0u;
}
else if(((int16_t)led_val - (int16_t)TIM3->CNT) > UINT8_MAX) {
led_val = 255u;
}
else {
led_val = (int16_t)led_val - (int16_t)TIM3->CNT;
}
TIM3->CNT = 0u;
if(button_pressed) {
if(GPIOA->IDR & GPIO_IDR_0) {
button_pressed = false;
}
}
else if(!(GPIOA->IDR & GPIO_IDR_0)) {
mode = (mode + 1) % RING_MODE_MAX;
button_pressed = true;
}
}
}
void SysTick_Handler(void) {
GPIOB->ODR ^= (1<<1);
wait_tick++;
}

38
firmware/setup/system_init.c
View File

@ -61,10 +61,44 @@ static void __init_default_clocks(void)
RCC->CIR = 0x00000000;
}
void __setup_clocks(void)
{
uint32_t tmp;
/* Switch PLL source to HSE OSC */
RCC->CFGR |= RCC_CFGR_PLLSRC;
/* Divide HSE by 2 to match HSI */
RCC->CFGR2 = 0x00000001;
/* Enable HSE and wait for it to become ready */
RCC->CR |= RCC_CR_HSEON;
/* Wait for HSE to be ready */
while (!(RCC->CR & RCC_CR_HSERDY));
/* Set PLL multiplication to 12 (4 MHz * 12 = 48 MHz SysClk) */
RCC->CFGR |= RCC_CFGR_PLLMUL_3 | RCC_CFGR_PLLMUL_1;
/* HSI Already running. Switch on PLL */
RCC->CR |= RCC_CR_PLLON;
/* Wait for PLL to be ready */
while (!(RCC->CR & RCC_CR_PLLRDY));
/* Switch System Clock to PLL */
tmp = RCC->CFGR;
tmp &= ~0x3;
tmp |= RCC_CFGR_SW_1;
RCC->CFGR = tmp;
/* Turn off HSI */
RCC->CR &= ~RCC_CR_HSEON;
}
void __system_init(void)
{
__init_default_clocks();
__init_default_clocks();
__setup_clocks();
}

47
firmware/sk6812.S Normal file
View File

@ -0,0 +1,47 @@
.global sk6812_send_led
.equ BSRR_REGISTER, 0x48000018
.equ PINNUM, 3
.syntax unified
sk6812_send_led:
push {lr}
push {r4, r5, r6}
ldr r1, =BSRR_REGISTER
ldr r2, =(1<<PINNUM)
ldr r3, =(1<<(PINNUM+16))
ldr r4, =32
ldr r5, =0x80000000
_bitloop:
tst r0, r5
beq sk6812_send_zero
bne sk6812_send_one
_bitloop_ret:
lsls r0, r0, #1
subs r4, r4, #1
bne _bitloop
pop {r4, r5, r6}
pop {pc}
sk6812_send_one:
str r2, [r1]
ldr r6, =0x5
bl wait_r6
str r3, [r1]
ldr r6, =0x2
bl wait_r6
b _bitloop_ret
sk6812_send_zero:
str r2, [r1]
ldr r6, =0x1
bl wait_r6
str r3, [r1]
ldr r6, =0x5
bl wait_r6
b _bitloop_ret
wait_r6:
subs r6, r6, #1
bne wait_r6
bx lr