diff options
Diffstat (limited to 'projects/bootloader/bootloader.c')
| -rw-r--r-- | projects/bootloader/bootloader.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/projects/bootloader/bootloader.c b/projects/bootloader/bootloader.c index 3040bd1..8417256 100644 --- a/projects/bootloader/bootloader.c +++ b/projects/bootloader/bootloader.c @@ -36,6 +36,7 @@ #include "stm-led.h" #include "stm-uart.h" #include "stm-fmc.h" +#include "stm-fpgacfg.h" #include "dfu.h" #undef HAL_Delay @@ -68,21 +69,27 @@ void check_early_dfu_jump(void) } } -int should_dfu() +static int should_dfu() { - int i; - uint8_t rx = 0; + /* JP7 and JP8 must be installed in order to reprogram the FPGA. + * We extend this to an enabling mechanism for reflashing the firmware. + * Unfortunately, we can't read JP7 and JP8 directly, as that just gives + * us the last things written to them, so we see if we can read the + * FPGA configuration memory. + */ + fpgacfg_access_control(ALLOW_ARM); + if (fpgacfg_check_id() != 1) + return 0; /* While blinking the blue LED for 5 seconds, see if we receive a CR on the MGMT UART. - * We've discussed also requiring one or both of the FPGA config jumpers installed - * before allowing DFU of the STM32 - that check could be done here. */ led_on(LED_BLUE); - for (i = 0; i < 50; i++) { + for (int i = 0; i < 50; i++) { HAL_Delay(100); led_toggle(LED_BLUE); + uint8_t rx = 0; if (uart_recv_char2(STM_UART_MGMT, &rx, 0) == HAL_OK) { - if (rx == 13) return 1; + if (rx == '\r') return 1; } } return 0; |