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stm32/serialno: Cleaned up the serial number handling code which is tripping GCC 11 up due to a compiler regression

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dragonmux 2022-06-06 07:10:45 -04:00 committed by Piotr Esden-Tempski
parent b4131ef637
commit 24ffef7175
1 changed files with 20 additions and 22 deletions
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42
src/platforms/stm32/serialno.c
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@ -23,44 +23,42 @@
char *serial_no_read(char *s)
{
#if DFU_SERIAL_LENGTH == 9
int i;
volatile uint32_t *unique_id_p = (volatile uint32_t *)DESIG_UNIQUE_ID_BASE;
uint32_t unique_id = *unique_id_p +
const volatile uint32_t *const unique_id_p = (volatile uint32_t *)DESIG_UNIQUE_ID_BASE;
const uint32_t unique_id = *unique_id_p +
*(unique_id_p + 1) +
*(unique_id_p + 2);
/* Fetch serial number from chip's unique ID */
for(i = 0; i < 8; i++) {
s[7-i] = ((unique_id >> (4*i)) & 0xF) + '0';
for(size_t i = 0; i < 8U; ++i) {
s[7U - i] = ((unique_id >> (i * 4U)) & 0x0FU) + '0';
/* If the character is something above 9, then add the offset to make it ASCII A-F */
if (s[i] > '9')
s[i] += 16; /* 'A' - '9' = 17, less 1 gives 16. */
}
for(i = 0; i < 8; i++)
if(s[i] > '9')
s[i] += 'A' - '9' - 1;
#elif DFU_SERIAL_LENGTH == 13
/* Use the same serial number as the ST DFU Bootloader.*/
uint16_t *uid = (uint16_t *)DESIG_UNIQUE_ID_BASE;
const uint16_t *const uid = (uint16_t *)DESIG_UNIQUE_ID_BASE;
# if defined(STM32F4) || defined(STM32F7)
int offset = 3;
# elif defined(STM32L0) || defined(STM32F0) || defined(STM32F3)
int offset = 5;
# endif
sprintf(s, "%04X%04X%04X",
uid[1] + uid[5], uid[0] + uid[4], uid[offset]);
sprintf(s, "%04X%04X%04X", uid[1] + uid[5], uid[0] + uid[4], uid[offset]);
#elif DFU_SERIAL_LENGTH == 25
int i;
uint32_t unique_id[3];
memcpy(unique_id, (uint32_t *)DESIG_UNIQUE_ID_BASE, 12);
for(i = 0; i < 8; i++) {
s[ 7-i] = ((unique_id[0] >> (4*i)) & 0xF) + '0';
s[15-i] = ((unique_id[1] >> (4*i)) & 0xF) + '0';
s[23-i] = ((unique_id[2] >> (4*i)) & 0xF) + '0';
memcpy(unique_id, (char *)DESIG_UNIQUE_ID_BASE, 12);
for(size_t i = 0; i < 8U; ++i) {
s[ 7U - i] = ((unique_id[0] >> (i * 4)) & 0x0F) + '0';
s[15U - i] = ((unique_id[1] >> (i * 4)) & 0x0F) + '0';
s[23U - i] = ((unique_id[2] >> (i * 4)) & 0x0F) + '0';
}
for (size_t i = 0; i < 24U; ++i) {
/* If the character is something above 9, then add the offset to make it ASCII A-F */
if (s[i] > '9')
s[i] += 16; /* 'A' - '9' = 17, less 1 gives 16. */
}
for (i = 0; i < 24; i++)
if(s[i] > '9')
s[i] += 'A' - '9' - 1;
#else
# WARNING "Unhandled DFU_SERIAL_LENGTH"
#endif
s[DFU_SERIAL_LENGTH - 1] = 0;
s[DFU_SERIAL_LENGTH - 1] = '\0';
return s;
}