108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
#include <libopencm3/stm32/gpio.h>
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#include "pinout.h"
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#include "led_chplex.h"
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#define NUM_LEDs 6
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static uint8_t led_index;
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static uint8_t led_mask;
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void led_chplex_init(void)
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{
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// set up required GPIOs
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gpio_clear(LED_PORT, LED_ALL_PINS);
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gpio_mode_setup(LED_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, LED_ALL_PINS);
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// initialize charlieplex stepping
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led_index = 0;
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// all LEDs off by default
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led_mask = 0;
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}
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void led_chplex_periodic(void)
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{
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// set all GPIOs to input to ensure the LEDs are properly switched off
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gpio_mode_setup(LED_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, LED_ALL_PINS);
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// apply the proper signals depending on LED index
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if(led_mask & (1 << led_index)) {
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switch(led_index)
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{
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case LED_CHPLEX_IDX_SOLAR_ON:
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gpio_set(LED_PORT, LED_A_PIN);
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gpio_clear(LED_PORT, LED_B_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_A_PIN | LED_B_PIN);
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break;
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case LED_CHPLEX_IDX_LOAD_ON:
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gpio_set(LED_PORT, LED_B_PIN);
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gpio_clear(LED_PORT, LED_C_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_B_PIN | LED_C_PIN);
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break;
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case LED_CHPLEX_IDX_ERR_TEMP:
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gpio_set(LED_PORT, LED_B_PIN);
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gpio_clear(LED_PORT, LED_A_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_A_PIN | LED_B_PIN);
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break;
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case LED_CHPLEX_IDX_ERR_LOAD:
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gpio_set(LED_PORT, LED_C_PIN);
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gpio_clear(LED_PORT, LED_B_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_B_PIN | LED_C_PIN);
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break;
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case LED_CHPLEX_IDX_CHARGE_PULSE:
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gpio_set(LED_PORT, LED_A_PIN);
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gpio_clear(LED_PORT, LED_C_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_A_PIN | LED_C_PIN);
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break;
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case LED_CHPLEX_IDX_DISCHARGE_PULSE:
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gpio_set(LED_PORT, LED_C_PIN);
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gpio_clear(LED_PORT, LED_A_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_A_PIN | LED_C_PIN);
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break;
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default:
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// unknown index => do nothing and reset index
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led_index = 0;
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break;
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}
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}
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led_index++;
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if(led_index >= NUM_LEDs) {
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led_index = 0;
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}
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}
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void led_chplex_on(uint8_t idx)
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{
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led_mask |= (1 << idx);
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}
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void led_chplex_off(uint8_t idx)
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{
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led_mask &= ~(1 << idx);
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}
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void led_chplex_toggle(uint8_t idx)
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{
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led_mask ^= (1 << idx);
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}
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void led_chplex_mask(uint8_t mask)
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{
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led_mask = mask;
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}
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