Comms between MAX 10 FPGA and ST uP
Revision 27:fe3dddcd448c, committed 2020-07-25
- Comitter:
- jimherd
- Date:
- Sat Jul 25 23:14:10 2020 +0000
- Parent:
- 26:1837bc6df8ef
- Commit message:
- Made 'hard_check_bus' routine public.
Changed in this revision
FPGA_bus.cpp | Show annotated file Show diff for this revision Revisions of this file |
FPGA_bus.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/FPGA_bus.cpp Tue Jul 07 11:03:34 2020 +0000 +++ b/FPGA_bus.cpp Sat Jul 25 23:14:10 2020 +0000 @@ -50,9 +50,9 @@ void FPGA_bus:: do_reset(void) { async_uP_reset = LOW; // generate low reset pulse - wait_us(20); + wait_us(FPGA_RESET_PULSE_WIDTH); async_uP_reset = HIGH; - wait_us(20); + wait_us(FPGA_RESET_PULSE_WIDTH); } //////////////////////////////////////////////////////////////////////////
--- a/FPGA_bus.h Tue Jul 07 11:03:34 2020 +0000 +++ b/FPGA_bus.h Sat Jul 25 23:14:10 2020 +0000 @@ -74,10 +74,11 @@ ////////////////////////////////////////////////////////////////////////// // FPGA constants -#define nS_IN_uS 1000 -#define FPGA_CLOCK_PERIOD_nS 20 +#define nS_IN_uS 1000 +#define FPGA_CLOCK_PERIOD_nS 20 #define uS_DELAY_BEFORE_TEST_HANDSHAKE 25 -#define HANDSHAKE_TIMEOUT_COUNT 10000 +#define HANDSHAKE_TIMEOUT_COUNT 10000 +#define FPGA_RESET_PULSE_WIDTH 20 // microseconds ////////////////////////////////////////////////////////////////////////// // error codes @@ -187,6 +188,7 @@ uint32_t read_count_measure(uint32_t channel); uint32_t get_SYS_data(void); int32_t soft_check_bus(void); + int32_t hard_check_bus(void); // // data // @@ -227,7 +229,6 @@ uint32_t register_data); void do_read(received_packet_t *buffer); void do_reset(void); - int32_t hard_check_bus(void); void update_FPGA_register_pointers(void); // // Hardware digital I/O lines