watch library: implement SPI

1 files changed, 10 insertions, 37 deletions

diff --git a/apps/spi-test/app.c b/apps/spi-test/app.c
index 6ddd2782..54b484ad 100644
--- a/apps/spi-test/app.c
+++ b/apps/spi-test/app.c
@@ -3,40 +3,10 @@
 #include <peripheral_clk_config.h>
 #include "watch.h"
 
-// NOTE: as of this writing (10/25/21) there is no SPI controller functionality in the watch library.
-// this is a very basic app to confirm that SPI is working, tested with board OSO-MISC-21-001 and a GD25Q16C Flash chip.
-// The updated SPI Flash sensor board design is OSO-MISC-21-017 (it's easier to build, 0603 passives instead of 0402's).
-
-struct io_descriptor *io;
-struct spi_m_sync_descriptor SPI_0;
+// this is a very basic app to confirm that SPI is working, tested with board OSO-MISC-21-017 and a GD25Q16C Flash chip.
 
 void app_init(void) {
-    // SPI_0_CLOCK_init
-    hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_CORE, CONF_GCLK_SERCOM3_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
-    hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_SLOW, CONF_GCLK_SERCOM3_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
-    hri_mclk_set_APBCMASK_SERCOM3_bit(MCLK);
-
-    spi_m_sync_init(&SPI_0, SERCOM3);
-
-    // SPI_0_PORT_init
-    gpio_set_pin_level(A3, true);
-    gpio_set_pin_direction(A3, GPIO_DIRECTION_OUT);
-    gpio_set_pin_function(A3, GPIO_PIN_FUNCTION_OFF);
-
-    gpio_set_pin_level(A2, false);
-    gpio_set_pin_direction(A2, GPIO_DIRECTION_OUT);
-    gpio_set_pin_function(A2, PINMUX_PB02C_SERCOM3_PAD0);
-
-    gpio_set_pin_direction(A4, GPIO_DIRECTION_IN);
-    gpio_set_pin_pull_mode(A4, GPIO_PULL_OFF);
-    gpio_set_pin_function(A4, PINMUX_PB00C_SERCOM3_PAD2);
-
-    gpio_set_pin_level(A1, false);
-    gpio_set_pin_direction(A1, GPIO_DIRECTION_OUT);
-    gpio_set_pin_function(A1, PINMUX_PB01C_SERCOM3_PAD3);
-
-    spi_m_sync_get_io_descriptor(&SPI_0, &io);
-    spi_m_sync_enable(&SPI_0);
+    watch_enable_spi();
 }
 
 void app_wake_from_backup(void) {
@@ -51,20 +21,23 @@ void app_prepare_for_standby(void) {
 void app_wake_from_standby(void) {
 }
 
-static uint8_t get_id_command[4] = {0x9F};
 
 bool app_loop(void) {
-    watch_set_pin_level(A3, false);
-    io_write(io, get_id_command, 1);
+    uint8_t get_id_command[1] = {0x9F};
     uint8_t buf[3] = {0};
 
+    watch_set_pin_level(A3, false);
+
     // should print 0, 0, 0
+    watch_spi_send(get_id_command, 1);
     printf("blank: %x, %x, %x\n", buf[0], buf[1], buf[2]);
-    io_read(io, buf, 3);
-    watch_set_pin_level(A3, true);
+
     // should print c8, 40, 15
+    watch_spi_receive(buf, 3);
     printf("ident: %x, %x, %x\n", buf[0], buf[1], buf[2]);
 
+    watch_set_pin_level(A3, true);
+
     delay_ms(100);
 
     return false;