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#include "arch.h"
#include "arch/arm/cortex-m4/mpu.h"
#include "arch/stm32l4xxx/peripherals/clock.h"
#include "arch/stm32l4xxx/peripherals/dma.h"
#include "arch/stm32l4xxx/peripherals/irq.h"
#include "arch/stm32l4xxx/peripherals/rcc.h"
#include "arch/stm32l4xxx/peripherals/spi.h"
#include "arch/stm32l4xxx/peripherals/system.h"
#include "drv/ws2812B/ws2812b.h"
#include "kern/delay.h"
#include "kern/systick/systick_manager.h"
#include "kern/dma/dma_manager.h"
#include "kern/gpio/gpio_manager.h"
#include "kern/gpio/sysled.h"
#include "kern/init.h"
#include "kern/log.h"
#include "kern/mem.h"
#include "kern/mpu/mpu_manager.h"
#include "kern/panic.h"
#include "kern/priv.h"
#include "user/syscall.h"
void on_hard_fault()
{
panic("Hard fault encountered!\n");
}
#ifdef ARCH_STM32L4
void configure_spi1()
{
int ec = 0;
gpio_enable_alternate_function(
GPIO_ALTERNATE_FUNCTION_SPI1_MOSI, GPIO_PIN_PA7, &ec);
if (ec) {
panic("Unable to set pin PA7 (ec=%d)\n", ec);
}
gpio_enable_alternate_function(
GPIO_ALTERNATE_FUNCTION_SPI1_NSS, GPIO_PIN_PA4, &ec);
if (ec) {
panic("Unable to set pin PA4 (ec=%d)\n", ec);
}
gpio_enable_alternate_function(
GPIO_ALTERNATE_FUNCTION_SPI1_SCK, GPIO_PIN_PA5, &ec);
if (ec) {
panic("Unable to set pin PA5 (ec=%d)\n", ec);
}
regset(RCC.apb2en_r, rcc_spi1en, 1);
uint32_t reg = 0;
regset(reg, spi_ldma_tx, 0);
regset(reg, spi_ldma_rx, 0);
regset(reg, spi_frxth, 0);
regset(reg, spi_ds, SPI_DATA_SIZE_8_BITS);
regset(reg, spi_txeie, 0);
regset(reg, spi_rxneie, 0);
regset(reg, spi_errie, 0);
regset(reg, spi_frf, 0);
regset(reg, spi_nssp, 0);
regset(reg, spi_ssoe, 0);
regset(reg, spi_txdmaen, 0);
regset(reg, spi_rxdmaen, 0);
SPI1.c_r2 = reg;
reg = 0;
regset(reg, spi_bidimode, 0);
regset(reg, spi_crcen, 0);
regset(reg, spi_crcnext, 0);
regset(reg, spi_crcl, 0);
regset(reg, spi_rxonly, 0);
regset(reg, spi_ssm, 1);
regset(reg, spi_ssi, 1);
regset(reg, spi_lsbfirst, 0);
regset(reg, spi_spe, 1);
regset(reg, spi_br, SPI_BAUD_FPCLK_DIV_32);
regset(reg, spi_mstr, 1);
regset(reg, spi_cpol, 0);
regset(reg, spi_cpha, 0);
SPI1.c_r1 = reg;
}
static uint8_t* compiled;
static size_t compiled_len;
extern uint8_t sintable[256];
static uint32_t time;
static void on_systick(void* nil)
{
// klogf("Systick.\n");
++time;
}
static void spi_write(uint8_t byte)
{
while (!regget(SPI1.s_r, spi_txe))
;
SPI1.dl_r = byte;
asm volatile("nop");
}
static void write_rgb(uint8_t red, uint8_t green, uint8_t blue)
{
#undef BIT
#define BIT(b, n) (!!((b) & (1 << (n))))
spi_write(
(1 << 7) | (BIT(green, 7) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(green, 6) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(green, 5) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(green, 4) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(green, 3) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(green, 2) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(green, 1) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(green, 0) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(red, 7) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(red, 6) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(red, 5) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(red, 4) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(red, 3) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(red, 2) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(red, 1) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(red, 0) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(blue, 7) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(blue, 6) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(blue, 5) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(blue, 4) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(blue, 3) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(blue, 2) << 2) | (0 << 1) | (0 << 0));
spi_write(
(1 << 7) | (BIT(blue, 1) << 6) | (0 << 5) | (0 << 4) | (1 << 3) |
(BIT(blue, 0) << 2) | (0 << 1) | (0 << 0));
}
void latch()
{
for (int i = 0; i < 20; ++i) {
spi_write(0);
}
}
static uint8_t amp(uint8_t in)
{
uint8_t out = in;
for (int i = 0; i < 10; ++ i) {
out = (out * in) / 256;
}
return out;
}
/* Main function. This gets executed from the interrupt vector defined above. */
int main()
{
gpio_reserved_pin_t sysled = get_sysled();
klogf("Start\n");
klogf("sintable: %p\n", sintable);
klogf("sintable[5]: %d\n", sintable[5]);
klogf("Flashed with OpenOCD!\n");
systick_add_callback(on_systick, NULL);
enable_systick(1000);
/* Enable interrupts. */
regset(SCB.stcs_r, scb_tickint, 1);
/* Start the systick. */
regset(SCB.stcs_r, scb_enable, 1);
#define SIZE 128
rgb_t rgb[SIZE];
for (int i = 0; i < SIZE; ++i) {
rgb[i].g = 0xff;
rgb[i].r = 0xff;
rgb[i].b = 0xff;
}
uint8_t red = 0x40;
uint8_t green = 0x40;
uint8_t blue = 0x40;
// compiled = ws2812b_compile_rgb(rgb, SIZE);
// compiled_len = SIZE * 9;
configure_spi1();
for (int i = 0; i < 100; ++i) {
write_rgb(0, 0, 0);
}
latch();
for (;;) {
set_gpio_pin_high(sysled);
latch();
int i;
for (i = 0; i < SIZE; ++i) {
red = byte_sin((i * 4 * 2 + time / 1000) & 0xff) / 2;
green = byte_sin((i * 4 * 3 + time / 1000) & 0xff) / 2;
blue = 0;
// blue = amp(byte_sin((i * 2 * 3 + time / 1000) & 0xff)) / 2;
// uint8_t red = byte_sin((i * 8 + 64 + time / 100) & 0xff);
// uint8_t green = byte_sin((i * 8 + 0 + time / 100) & 0xff);
// uint32_t blue = (((red - 128) * (green - 128)) / 256) + 128;
write_rgb(red, green, blue);
}
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(0,0,0);
// write_rgb(red, green, blue);
set_gpio_pin_low(sysled);
latch();
}
for (;;) {
spi_write(0);
}
}
#endif
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