stm32/mphalport: Add support for having MAC in OTP region.
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@ -151,7 +151,30 @@ void mp_hal_pin_config_speed(mp_hal_pin_obj_t pin_obj, uint32_t speed) {
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gpio->OSPEEDR = (gpio->OSPEEDR & ~(3 << (2 * pin))) | (speed << (2 * pin));
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}
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/*******************************************************************************/
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// MAC address
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typedef struct _pyb_otp_t {
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uint16_t series;
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uint16_t rev;
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uint8_t mac[6];
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} pyb_otp_t;
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#if defined(STM32F722xx) || defined(STM32F723xx) || defined(STM32F732xx) || defined(STM32F733xx)
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#define OTP_ADDR (0x1ff079e0)
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#else
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#define OTP_ADDR (0x1ff0f3c0)
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#endif
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#define OTP ((pyb_otp_t*)OTP_ADDR)
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MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) {
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// Check if OTP region has a valid MAC address, and use it if it does
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if (OTP->series == 0x00d1 && OTP->mac[0] == 'H' && OTP->mac[1] == 'J' && OTP->mac[2] == '0') {
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memcpy(buf, OTP->mac, 6);
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buf[5] += idx;
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return;
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}
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// Generate a random locally administered MAC address (LAA)
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uint8_t *id = (uint8_t *)MP_HAL_UNIQUE_ID_ADDRESS;
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buf[0] = 0x02; // LAA range
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@ -161,3 +184,12 @@ MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) {
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buf[4] = id[2];
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buf[5] = (id[0] << 2) | idx;
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}
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void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest) {
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static const char hexchr[16] = "0123456789ABCDEF";
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uint8_t mac[6];
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mp_hal_get_mac(idx, mac);
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for (; chr_len; ++chr_off, --chr_len) {
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*dest++ = hexchr[mac[chr_off >> 1] >> (4 * (1 - (chr_off & 1))) & 0xf];
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}
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}
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@ -88,3 +88,4 @@ enum {
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};
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void mp_hal_get_mac(int idx, uint8_t buf[6]);
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void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest);
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