From 370a8116c4348a849c2dafb2c90fa5ba12b8c5dc Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Sat, 1 Jun 2019 16:08:40 +1000
Subject: [PATCH] stm32/mphalport: Add support for having MAC in OTP region.
---
ports/stm32/mphalport.c | 32 ++++++++++++++++++++++++++++++++
ports/stm32/mphalport.h | 1 +
2 files changed, 33 insertions(+)
diff --git a/ports/stm32/mphalport.c b/ports/stm32/mphalport.c
index c770b62d2..f4ae7293c 100644
--- a/ports/stm32/mphalport.c
+++ b/ports/stm32/mphalport.c
@@ -151,7 +151,30 @@ void mp_hal_pin_config_speed(mp_hal_pin_obj_t pin_obj, uint32_t speed) {
gpio->OSPEEDR = (gpio->OSPEEDR & ~(3 << (2 * pin))) | (speed << (2 * pin));
}
+/*******************************************************************************/
+// MAC address
+
+typedef struct _pyb_otp_t {
+ uint16_t series;
+ uint16_t rev;
+ uint8_t mac[6];
+} pyb_otp_t;
+
+#if defined(STM32F722xx) || defined(STM32F723xx) || defined(STM32F732xx) || defined(STM32F733xx)
+#define OTP_ADDR (0x1ff079e0)
+#else
+#define OTP_ADDR (0x1ff0f3c0)
+#endif
+#define OTP ((pyb_otp_t*)OTP_ADDR)
+
MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) {
+ // Check if OTP region has a valid MAC address, and use it if it does
+ if (OTP->series == 0x00d1 && OTP->mac[0] == 'H' && OTP->mac[1] == 'J' && OTP->mac[2] == '0') {
+ memcpy(buf, OTP->mac, 6);
+ buf[5] += idx;
+ return;
+ }
+
// Generate a random locally administered MAC address (LAA)
uint8_t *id = (uint8_t *)MP_HAL_UNIQUE_ID_ADDRESS;
buf[0] = 0x02; // LAA range
@@ -161,3 +184,12 @@ MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) {
buf[4] = id[2];
buf[5] = (id[0] << 2) | idx;
}
+
+void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest) {
+ static const char hexchr[16] = "0123456789ABCDEF";
+ uint8_t mac[6];
+ mp_hal_get_mac(idx, mac);
+ for (; chr_len; ++chr_off, --chr_len) {
+ *dest++ = hexchr[mac[chr_off >> 1] >> (4 * (1 - (chr_off & 1))) & 0xf];
+ }
+}
diff --git a/ports/stm32/mphalport.h b/ports/stm32/mphalport.h
index d828bb9dd..0c163fbf8 100644
--- a/ports/stm32/mphalport.h
+++ b/ports/stm32/mphalport.h
@@ -88,3 +88,4 @@ enum {
};
void mp_hal_get_mac(int idx, uint8_t buf[6]);
+void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest);
--
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