stm32/mphalport: Support unique ID on H5.

dpgeorge · dpgeorge · commit 39fd8ebf8dbc · 2023-03-31T14:15:18.000+11:00
It must be read 32-bits at a time from the ROM address.

Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/ports/stm32/main.c b/ports/stm32/main.c
@@ -393,6 +393,13 @@ void stm32_main(uint32_t reset_mode) {
     MICROPY_BOARD_EARLY_INIT();
 
     // basic sub-system init
+    #if defined(STM32H5)
+    volatile uint32_t *src = (volatile uint32_t *)UID_BASE;
+    uint32_t *dest = (uint32_t *)&mp_hal_unique_id_address[0];
+    dest[0] = src[0];
+    dest[1] = src[1];
+    dest[2] = src[2];
+    #endif
     #if defined(STM32WB)
     rfcore_init();
     #endif
diff --git a/ports/stm32/mpconfigboard_common.h b/ports/stm32/mpconfigboard_common.h
@@ -342,7 +342,7 @@
 // Configuration for STM32H5 series
 #elif defined(STM32H5)
 
-#define MP_HAL_UNIQUE_ID_ADDRESS (0x20000000) // TODO
+#define MP_HAL_UNIQUE_ID_ADDRESS (mp_hal_unique_id_address)
 #define PYB_EXTI_NUM_VECTORS (58)
 #define MICROPY_HW_MAX_I2C (2) // TODO check
 #define MICROPY_HW_MAX_TIMER (17)
diff --git a/ports/stm32/mphalport.c b/ports/stm32/mphalport.c
@@ -16,6 +16,10 @@ const byte mp_hal_status_to_errno_table[4] = {
     [HAL_TIMEOUT] = MP_ETIMEDOUT,
 };
 
+#if defined(STM32H5)
+uint8_t mp_hal_unique_id_address[12];
+#endif
+
 NORETURN void mp_hal_raise(HAL_StatusTypeDef status) {
     mp_raise_OSError(mp_hal_status_to_errno_table[status]);
 }
diff --git a/ports/stm32/mphalport.h b/ports/stm32/mphalport.h
@@ -2,6 +2,8 @@
 #include STM32_HAL_H
 #include "pin.h"
 
+extern uint8_t mp_hal_unique_id_address[12];
+
 // F0-1.9.0+F4-1.16.0+F7-1.7.0+G0-1.5.1+G4-1.3.0+H7-1.6.0+L0-1.11.2+L4-1.17.0+WB-1.10.0+WL-1.1.0
 #if defined(STM32F0)
 #define MICROPY_PLATFORM_VERSION "HAL1.9.0"
diff --git a/ports/stm32/rng.c b/ports/stm32/rng.c
@@ -24,6 +24,7 @@
  * THE SOFTWARE.
  */
 
+#include "py/mphal.h"
 #include "rtc.h"
 #include "rng.h"
 
