mirror of
https://github.com/firewalkwithm3/Sensor-Watch.git
synced 2024-11-22 19:20:30 +08:00
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <peripheral_clk_config.h>
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#include "watch.h"
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// NOTE: as of this writing (10/25/21) there is no SPI controller functionality in the watch library.
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// this is a very basic app to confirm that SPI is working, tested with board OSO-MISC-21-001 and a GD25Q16C Flash chip.
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// The updated SPI Flash sensor board design is OSO-MISC-21-017 (it's easier to build, 0603 passives instead of 0402's).
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struct io_descriptor *io;
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struct spi_m_sync_descriptor SPI_0;
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void app_init(void) {
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// SPI_0_CLOCK_init
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hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_CORE, CONF_GCLK_SERCOM3_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
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hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_SLOW, CONF_GCLK_SERCOM3_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
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hri_mclk_set_APBCMASK_SERCOM3_bit(MCLK);
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spi_m_sync_init(&SPI_0, SERCOM3);
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// SPI_0_PORT_init
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gpio_set_pin_level(A3, true);
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gpio_set_pin_direction(A3, GPIO_DIRECTION_OUT);
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gpio_set_pin_function(A3, GPIO_PIN_FUNCTION_OFF);
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gpio_set_pin_level(A2, false);
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gpio_set_pin_direction(A2, GPIO_DIRECTION_OUT);
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gpio_set_pin_function(A2, PINMUX_PB02C_SERCOM3_PAD0);
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gpio_set_pin_direction(A4, GPIO_DIRECTION_IN);
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gpio_set_pin_pull_mode(A4, GPIO_PULL_OFF);
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gpio_set_pin_function(A4, PINMUX_PB00C_SERCOM3_PAD2);
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gpio_set_pin_level(A1, false);
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gpio_set_pin_direction(A1, GPIO_DIRECTION_OUT);
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gpio_set_pin_function(A1, PINMUX_PB01C_SERCOM3_PAD3);
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spi_m_sync_get_io_descriptor(&SPI_0, &io);
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spi_m_sync_enable(&SPI_0);
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}
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void app_wake_from_backup(void) {
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}
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void app_setup(void) {
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}
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void app_prepare_for_standby(void) {
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}
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void app_wake_from_standby(void) {
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}
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static uint8_t get_id_command[4] = {0x9F};
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bool app_loop(void) {
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watch_set_pin_level(A3, false);
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io_write(io, get_id_command, 1);
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uint8_t buf[3] = {0};
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// should print 0, 0, 0
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printf("blank: %x, %x, %x\n", buf[0], buf[1], buf[2]);
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io_read(io, buf, 3);
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watch_set_pin_level(A3, true);
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// should print c8, 40, 15
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printf("ident: %x, %x, %x\n", buf[0], buf[1], buf[2]);
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delay_ms(100);
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return false;
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}
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