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Minor tweaks in STM32 examples

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Fix comments in newer mip initialization (main.c)
Correct stack initialization (boot.c)
Remove SCC clock enable when not needed (mcu.h)
This commit is contained in:
Sergio R. Caprile 2022-12-09 15:20:51 -03:00
parent 0b2712f52f
commit 2c014778d9
7 changed files with 8 additions and 14 deletions
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6
examples/stm32/nucleo-f429zi-baremetal/boot.c
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@ -3,9 +3,6 @@
// Startup code // Startup code
__attribute__((naked, noreturn)) void _reset(void) { __attribute__((naked, noreturn)) void _reset(void) {
// Init stack
asm("ldr sp, = _estack");
// Initialise memory // Initialise memory
extern long _sbss, _ebss, _sdata, _edata, _sidata; extern long _sbss, _ebss, _sdata, _edata, _sidata;
for (long *src = &_sbss; src < &_ebss; src++) *src = 0; for (long *src = &_sbss; src < &_ebss; src++) *src = 0;
@ -125,9 +122,10 @@ WEAK_ALIAS void LTDC_ER_IRQHandler(void);
WEAK_ALIAS void DMA2D_IRQHandler(void); WEAK_ALIAS void DMA2D_IRQHandler(void);
// IRQ table // IRQ table
extern void _estack();
__attribute__((section(".vectors"))) void (*tab[16 + 91])(void) = { __attribute__((section(".vectors"))) void (*tab[16 + 91])(void) = {
// Cortex interrupts // Cortex interrupts
0, _reset, NMI_Handler, HardFault_Handler, MemManage_Handler, _estack, _reset, NMI_Handler, HardFault_Handler, MemManage_Handler,
BusFault_Handler, UsageFault_Handler, 0, 0, 0, 0, SVC_Handler, BusFault_Handler, UsageFault_Handler, 0, 0, 0, 0, SVC_Handler,
DebugMon_Handler, 0, PendSV_Handler, SysTick_Handler, DebugMon_Handler, 0, PendSV_Handler, SysTick_Handler,

2
examples/stm32/nucleo-f429zi-baremetal/main.c
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@ -68,7 +68,7 @@ int main(void) {
mg_timer_add(&mgr, 500, MG_TIMER_REPEAT, blink_cb, &mgr); mg_timer_add(&mgr, 500, MG_TIMER_REPEAT, blink_cb, &mgr);
// Initialise Mongoose network stack // Initialise Mongoose network stack
// Specify MAC address, and use 0 for IP, mask, GW - i.e. use DHCP // Specify MAC address, either set use_dhcp or enter a static config.
// For static configuration, specify IP/mask/GW in network byte order // For static configuration, specify IP/mask/GW in network byte order
struct mip_driver_stm32 driver_data = {.mdc_cr = 4}; // See driver_stm32.h struct mip_driver_stm32 driver_data = {.mdc_cr = 4}; // See driver_stm32.h
struct mip_if mif = { struct mip_if mif = {

1
examples/stm32/nucleo-f429zi-baremetal/mcu.h
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@ -65,7 +65,6 @@ static inline void systick_init(uint32_t ticks) {
SYSTICK->LOAD = ticks - 1; SYSTICK->LOAD = ticks - 1;
SYSTICK->VAL = 0; SYSTICK->VAL = 0;
SYSTICK->CTRL = BIT(0) | BIT(1) | BIT(2); // Enable systick SYSTICK->CTRL = BIT(0) | BIT(1) | BIT(2); // Enable systick
RCC->APB2ENR |= BIT(14); // Enable SYSCFG
} }
struct flash { struct flash {

4
examples/stm32/nucleo-f429zi-freertos-mip/main.c
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@ -31,6 +31,7 @@ static void ethernet_init(void) {
} }
NVIC_EnableIRQ(61); // Setup Ethernet IRQ handler NVIC_EnableIRQ(61); // Setup Ethernet IRQ handler
RCC->APB2ENR |= BIT(14); // Enable SYSCFG
SYSCFG->PMC |= BIT(23); // Use RMII. Goes first! SYSCFG->PMC |= BIT(23); // Use RMII. Goes first!
RCC->AHB1ENR |= BIT(25) | BIT(26) | BIT(27); // Enable Ethernet clocks RCC->AHB1ENR |= BIT(25) | BIT(26) | BIT(27); // Enable Ethernet clocks
RCC->AHB1RSTR |= BIT(25); // ETHMAC force reset RCC->AHB1RSTR |= BIT(25); // ETHMAC force reset
@ -43,7 +44,7 @@ static void server(void *args) {
mg_log_set(MG_LL_DEBUG); // Set log level mg_log_set(MG_LL_DEBUG); // Set log level
// Initialise Mongoose network stack // Initialise Mongoose network stack
// Specify MAC address, and use 0 for IP, mask, GW - i.e. use DHCP // Specify MAC address, either set use_dhcp or enter a static config.
// For static configuration, specify IP/mask/GW in network byte order // For static configuration, specify IP/mask/GW in network byte order
MG_INFO(("Initializing Ethernet driver")); MG_INFO(("Initializing Ethernet driver"));
ethernet_init(); ethernet_init();
@ -74,7 +75,6 @@ static void blinker(void *args) {
} }
int main(void) { int main(void) {
RCC->APB2ENR |= BIT(14); // Enable SYSCFG: for systick & Ethernet
clock_init(); // Set clock to max of 180 MHz clock_init(); // Set clock to max of 180 MHz
systick_init(FREQ / 1000); // Tick every 1 ms systick_init(FREQ / 1000); // Tick every 1 ms
uart_init(UART3, 115200); // Initialise UART uart_init(UART3, 115200); // Initialise UART

6
examples/stm32/nucleo-f746zg-baremetal/boot.c
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@ -3,9 +3,6 @@
// Startup code // Startup code
__attribute__((naked, noreturn)) void _reset(void) { __attribute__((naked, noreturn)) void _reset(void) {
// Init stack
asm("ldr sp, = _estack");
// Initialise memory // Initialise memory
extern long _sbss, _ebss, _sdata, _edata, _sidata; extern long _sbss, _ebss, _sdata, _edata, _sidata;
for (long *src = &_sbss; src < &_ebss; src++) *src = 0; for (long *src = &_sbss; src < &_ebss; src++) *src = 0;
@ -132,9 +129,10 @@ WEAK_ALIAS void I2C4_ER_IRQHandler(void);
WEAK_ALIAS void SPDIF_RX_IRQHandler(void); WEAK_ALIAS void SPDIF_RX_IRQHandler(void);
// IRQ table // IRQ table
extern void _estack();
__attribute__((section(".vectors"))) void (*tab[16 + 98])(void) = { __attribute__((section(".vectors"))) void (*tab[16 + 98])(void) = {
// Cortex interrupts // Cortex interrupts
0, _reset, NMI_Handler, HardFault_Handler, MemManage_Handler, _estack, _reset, NMI_Handler, HardFault_Handler, MemManage_Handler,
BusFault_Handler, UsageFault_Handler, 0, 0, 0, 0, SVC_Handler, BusFault_Handler, UsageFault_Handler, 0, 0, 0, 0, SVC_Handler,
DebugMon_Handler, 0, PendSV_Handler, SysTick_Handler, DebugMon_Handler, 0, PendSV_Handler, SysTick_Handler,

2
examples/stm32/nucleo-f746zg-baremetal/main.c
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@ -68,7 +68,7 @@ int main(void) {
mg_timer_add(&mgr, 500, MG_TIMER_REPEAT, blink_cb, &mgr); mg_timer_add(&mgr, 500, MG_TIMER_REPEAT, blink_cb, &mgr);
// Initialise Mongoose network stack // Initialise Mongoose network stack
// Specify MAC address, and use 0 for IP, mask, GW - i.e. use DHCP // Specify MAC address, either set use_dhcp or enter a static config.
// For static configuration, specify IP/mask/GW in network byte order // For static configuration, specify IP/mask/GW in network byte order
struct mip_driver_stm32 driver_data = {.mdc_cr = 4}; // See driver_stm32.h struct mip_driver_stm32 driver_data = {.mdc_cr = 4}; // See driver_stm32.h
struct mip_if mif = { struct mip_if mif = {

1
examples/stm32/nucleo-f746zg-baremetal/mcu.h
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@ -66,7 +66,6 @@ static inline void systick_init(uint32_t ticks) {
SYSTICK->LOAD = ticks - 1; SYSTICK->LOAD = ticks - 1;
SYSTICK->VAL = 0; SYSTICK->VAL = 0;
SYSTICK->CTRL = BIT(0) | BIT(1) | BIT(2); // Enable systick SYSTICK->CTRL = BIT(0) | BIT(1) | BIT(2); // Enable systick
RCC->APB2ENR |= BIT(14); // Enable SYSCFG
} }
struct flash { struct flash {