Add multi-panel Pico UDP firmware and Python LED control.

Pico panels get static IPs on 10.1.1.10–14 with per-panel LED counts, Makefile deploy targets, and Python examples for animations, sync tests, and direct Pi SPI control.

Co-authored-by: Cursor <cursoragent@cursor.com>

firmware/panel/wizchip_spi.c

@@ -0,0 +1,121 @@
+/**
+ * W5500 SPI port for portal panel adapter (SPI1, GP9–13).
+ * Derived from WIZnet-PICO-C port/ioLibrary_Driver (BSD-3-Clause).
+ */
+
+#include <stdio.h>
+
+#include "board_config.h"
+#include "wizchip_conf.h"
+#include "wizchip_spi.h"
+
+#include "hardware/gpio.h"
+#include "hardware/spi.h"
+#include "pico/binary_info.h"
+#include "pico/critical_section.h"
+#include "pico/stdlib.h"
+
+static critical_section_t g_wizchip_cri_sec;
+
+static inline void wizchip_select(void) {
+    gpio_put(PIN_CS, 0);
+}
+
+static inline void wizchip_deselect(void) {
+    gpio_put(PIN_CS, 1);
+}
+
+static uint8_t wizchip_read(void) {
+    uint8_t rx = 0;
+    uint8_t tx = 0xff;
+    spi_read_blocking(SPI_PORT, tx, &rx, 1);
+    return rx;
+}
+
+static void wizchip_write(uint8_t tx) {
+    spi_write_blocking(SPI_PORT, &tx, 1);
+}
+
+static void wizchip_critical_section_lock(void) {
+    critical_section_enter_blocking(&g_wizchip_cri_sec);
+}
+
+static void wizchip_critical_section_unlock(void) {
+    critical_section_exit(&g_wizchip_cri_sec);
+}
+
+void wizchip_reset(void) {
+    gpio_init(PIN_RST);
+    gpio_set_dir(PIN_RST, GPIO_OUT);
+    gpio_put(PIN_RST, 0);
+    sleep_ms(100);
+    gpio_put(PIN_RST, 1);
+    sleep_ms(100);
+    bi_decl(bi_1pin_with_name(PIN_RST, "W5500 RESET"));
+}
+
+void wizchip_spi_initialize(void) {
+    spi_init(SPI_PORT, SPI_CLK_MHZ * 1000 * 1000);
+
+    gpio_set_function(PIN_SCK, GPIO_FUNC_SPI);
+    gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);
+    gpio_set_function(PIN_MISO, GPIO_FUNC_SPI);
+
+    bi_decl(bi_3pins_with_func(PIN_MISO, PIN_MOSI, PIN_SCK, GPIO_FUNC_SPI));
+
+    gpio_init(PIN_CS);
+    gpio_set_dir(PIN_CS, GPIO_OUT);
+    gpio_put(PIN_CS, 1);
+    bi_decl(bi_1pin_with_name(PIN_CS, "W5500 CS"));
+}
+
+void wizchip_cris_initialize(void) {
+    critical_section_init(&g_wizchip_cri_sec);
+    reg_wizchip_cris_cbfunc(wizchip_critical_section_lock, wizchip_critical_section_unlock);
+}
+
+void wizchip_initialize(void) {
+    wizchip_deselect();
+    reg_wizchip_cs_cbfunc(wizchip_select, wizchip_deselect);
+    reg_wizchip_spi_cbfunc(wizchip_read, wizchip_write);
+
+    uint8_t memsize[2][8] = {
+        {2, 2, 2, 2, 2, 2, 2, 2},
+        {2, 2, 2, 2, 2, 2, 2, 2},
+    };
+
+    if (ctlwizchip(CW_INIT_WIZCHIP, (void *)memsize) == -1) {
+        printf("W5500 init failed\n");
+        return;
+    }
+
+    uint8_t link = PHY_LINK_OFF;
+    do {
+        if (ctlwizchip(CW_GET_PHYLINK, (void *)&link) == -1) {
+            printf("PHY link unknown\n");
+            return;
+        }
+    } while (link == PHY_LINK_OFF);
+}
+
+void wizchip_check(void) {
+    if (getVERSIONR() != 0x04) {
+        printf("W5500 version mismatch: 0x%02x\n", getVERSIONR());
+        while (1) {
+            tight_loop_contents();
+        }
+    }
+}
+
+void network_initialize(wiz_NetInfo net_info) {
+    ctlnetwork(CN_SET_NETINFO, (void *)&net_info);
+}
+
+void print_network_information(wiz_NetInfo net_info) {
+    ctlnetwork(CN_GET_NETINFO, (void *)&net_info);
+    printf("MAC %02X:%02X:%02X:%02X:%02X:%02X\n",
+           net_info.mac[0], net_info.mac[1], net_info.mac[2],
+           net_info.mac[3], net_info.mac[4], net_info.mac[5]);
+    printf("IP %d.%d.%d.%d\n",
+           net_info.ip[0], net_info.ip[1], net_info.ip[2], net_info.ip[3]);
+}