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uart-basic: add l4

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Karl Palsson 2017-10-25 23:54:17 +00:00
parent 0cf7359b78
commit 3c53aa4ec3
2 changed files with 103 additions and 0 deletions
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26
tests/uart-basic/Makefile.stm32l476disco Normal file
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# This is just a makefile.
# Consider it released into the public domain, or, where not available,
# available under your choice of BSD2clause, MIT, X11, ISC or Apache2 licenses
# Karl Palsson <karlp@tweak.net.au>
BOARD = stm32l476disco
PROJECT = uart-basic-$(BOARD)
BUILD_DIR = bin-$(BOARD)
SHARED_DIR = ../../shared
CFILES = main-$(BOARD).c
CFILES += uart-basic.c
VPATH += $(SHARED_DIR)
INCLUDES += $(patsubst %,-I%, . $(SHARED_DIR))
OPENCM3_DIR=../../libopencm3/
### This section can go to an arch shared rules eventually...
DEVICE=stm32l476vgt6
#OOCD_INTERFACE = stlink-v2-1
#OOCD_TARGET = stm32l4x
OOCD_FILE = ../../openocd/openocd.$(BOARD).cfg
include ../../rules.mk

77
tests/uart-basic/main-stm32l476disco.c Normal file
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/*
* Oct 2017 Karl Palsson <karlp@tweak.net.au>
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/flash.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/pwr.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/usart.h>
#include "uart-basic.h"
#define LED_DISCO_GREEN_RCC RCC_GPIOE
#define LED_DISCO_GREEN_PORT GPIOE
#define LED_DISCO_GREEN_PIN GPIO8
void usart2_isr(void)
{
ub_irq_handler();
}
static void setup_rcc_hack(void)
{
pwr_set_vos_scale(PWR_SCALE1);
flash_set_ws(FLASH_ACR_LATENCY_2WS);
rcc_set_msi_range(RCC_CR_MSIRANGE_48MHZ);
/* ok, we manually poked around, let the lib know */
rcc_apb1_frequency = rcc_apb2_frequency = 48e6;
}
static void board_init(void)
{
rcc_periph_clock_enable(RCC_GPIOD);
gpio_mode_setup(GPIOD, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO5 | GPIO6);
/* usart2 is AF7 */
gpio_set_af(GPIOD, GPIO_AF7, GPIO5 | GPIO6);
}
int main(void)
{
int i;
int j = 0;
setup_rcc_hack();
board_init();
struct ub_hw ub = {
.uart = USART2,
.uart_nvic = NVIC_USART2_IRQ,
.uart_rcc = RCC_USART2,
};
ub_init(&ub);
printf("hi guys!\n");
/* green led for ticking */
rcc_periph_clock_enable(LED_DISCO_GREEN_RCC);
gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
LED_DISCO_GREEN_PIN);
while (1) {
gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN);
for (i = 0; i < 0xa0000; i++) { /* Wait a bit. */
__asm__("NOP");
}
ub_task();
gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN);
for (i = 0; i < 0xa0000; i++) { /* Wait a bit. */
__asm__("NOP");
}
}
return 0;
}