add driver for W5500

src/w5500_rp.cpp

@@ -0,0 +1,40 @@
+
+#include <cstddef>
+#include <cstdint>
+#include <wizchip_conf.h>
+#include "hardware/spi.h"
+#include <pico/stdlib.h>
+
+#include "config.h"
+#include "w5500_rp.h"
+
+void w5500_rp_spi_write_byte(uint8_t byte) {
+    spi_write_blocking(W5500_SPI_DRIVER, &byte, 1);
+}
+uint8_t w5500_rp_spi_read_byte() {
+    uint8_t byte;
+    spi_read_blocking(W5500_SPI_DRIVER, 0, &byte, 1);
+    return byte;
+}
+
+void w5500_rp_spi_write_burst(uint8_t *buffer, uint16_t size) {
+    spi_write_blocking(W5500_SPI_DRIVER, buffer, size);
+}
+void w5500_rp_spi_read_burst(uint8_t *buffer, uint16_t size) {
+    uint8_t byte;
+    spi_read_blocking(W5500_SPI_DRIVER, 0, buffer, size);
+}
+
+void w5500_rp_spi_cs_select() {
+    gpio_put(PIN_W5500_CS, 0);
+}
+void w5500_rp_spi_cs_deselect() {
+    gpio_put(PIN_W5500_CS, 1);
+}
+
+void w5500_rp_init() {
+    reg_wizchip_spi_cbfunc(&w5500_rp_spi_read_byte, &w5500_rp_spi_write_byte);
+    reg_wizchip_spiburst_cbfunc(&w5500_rp_spi_read_burst, &w5500_rp_spi_write_burst);
+    reg_wizchip_cs_cbfunc(w5500_rp_spi_cs_select, w5500_rp_spi_cs_deselect);
+    reg_wizchip_cris_cbfunc(NULL, NULL);
+}