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Update some of the SPI examples to use PICO_DEFAULT_SPI and binary_info

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This commit is contained in:
Andrew Scheller
2021-03-04 11:53:48 +00:00
committed by Graham Sanderson
parent a5363d18a6
commit 83f0eed8c5
5 changed files with 92 additions and 65 deletions
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30
pio/spi/spi_flash.c
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@@ -7,16 +7,12 @@
#include <stdio.h>
#include "pico/stdlib.h"
#include "pico/binary_info.h"
#include "pio_spi.h"
// This example uses PIO to erase, program and read back a SPI serial flash
// memory.
#define PIN_MISO 16
#define PIN_MOSI 17
#define PIN_SCK 18
#define PIN_CS 19
// ----------------------------------------------------------------------------
// Generic serial flash code
@@ -102,17 +98,24 @@ void printbuf(const uint8_t buf[FLASH_PAGE_SIZE]) {
int main() {
stdio_init_all();
#if !defined(PICO_DEFAULT_SPI_SCK_PIN) || !defined(PICO_DEFAULT_SPI_TX_PIN) || !defined(PICO_DEFAULT_SPI_RX_PIN) || !defined(PICO_DEFAULT_SPI_CSN_PIN)
#warning pio/spi/spi_flash example requires a board with SPI pins
puts("Default SPI pins were not defined");
#else
puts("PIO SPI Example");
pio_spi_inst_t spi = {
.pio = pio0,
.sm = 0,
.cs_pin = PIN_CS
.cs_pin = PICO_DEFAULT_SPI_CSN_PIN
};
gpio_init(PIN_CS);
gpio_put(PIN_CS, 1);
gpio_set_dir(PIN_CS, GPIO_OUT);
gpio_init(PICO_DEFAULT_SPI_CSN_PIN);
gpio_put(PICO_DEFAULT_SPI_CSN_PIN, 1);
gpio_set_dir(PICO_DEFAULT_SPI_CSN_PIN, GPIO_OUT);
// Make the CS pin available to picotool
bi_decl(bi_1pin_with_name(PICO_DEFAULT_SPI_CSN_PIN, "CS"));
uint offset = pio_add_program(spi.pio, &spi_cpha0_program);
printf("Loaded program at %d\n", offset);
@@ -122,10 +125,12 @@ int main() {
31.25f, // 1 MHz @ 125 clk_sys
false, // CPHA = 0
false, // CPOL = 0
PIN_SCK,
PIN_MOSI,
PIN_MISO
PICO_DEFAULT_SPI_SCK_PIN,
PICO_DEFAULT_SPI_TX_PIN,
PICO_DEFAULT_SPI_RX_PIN
);
// Make the SPI pins available to picotool
bi_decl(bi_3pins_with_func(PICO_DEFAULT_SPI_RX_PIN, PICO_DEFAULT_SPI_TX_PIN, PICO_DEFAULT_SPI_SCK_PIN, GPIO_FUNC_PIO0));
uint8_t page_buf[FLASH_PAGE_SIZE];
@@ -152,4 +157,5 @@ int main() {
printbuf(page_buf);
return 0;
#endif
}