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Replace TX flag with a mode setting.

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This is to let us start adding new operatin modes for the M0.
This commit is contained in:
Martin Ling
2021-12-24 07:44:18 +00:00
parent c0d0cd2a1d
commit 5b50b2dfac
5 changed files with 31 additions and 17 deletions
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7
firmware/hackrf_usb/m0_state.h
View File

@ -26,9 +26,14 @@
#include <usb_request.h>
struct m0_state {
uint32_t mode;
uint32_t m0_count;
uint32_t m4_count;
uint32_t tx;
};
enum m0_mode {
M0_MODE_RX = 0,
M0_MODE_TX = 1,
};
/* Address of m0_state is set in ldscripts. If you change the name of this

23
firmware/hackrf_usb/sgpio_m0.s
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@ -108,9 +108,13 @@ registers and fixed memory addresses.
.equ STATE_BASE, 0x20007000
// Offsets into the state structure.
.equ M0_COUNT, 0x00
.equ M4_COUNT, 0x04
.equ TX, 0x08
.equ MODE, 0x00
.equ M0_COUNT, 0x04
.equ M4_COUNT, 0x08
// Operating modes.
.equ MODE_RX, 0
.equ MODE_TX, 1
// Our slice chain is set up as follows (ascending data age; arrows are reversed for flow):
// L -> F -> K -> C -> J -> E -> I -> A
@ -159,9 +163,9 @@ main:
// Initialise state.
zero .req r0
mov zero, #0 // zero = 0 // 1
str zero, [state, #MODE] // state.mode = zero // 2
str zero, [state, #M0_COUNT] // state.m0_count = zero // 2
str zero, [state, #M4_COUNT] // state.m4_count = zero // 2
str zero, [state, #TX] // state.tx = zero // 2
loop:
// The worst case timing is assumed to occur when reading the interrupt
@ -200,14 +204,13 @@ loop:
and buf_ptr, count // buf_ptr &= count // 1
add buf_ptr, buf_base // buf_ptr += buf_base // 1
tx .req r0
// Load direction (TX or RX)
ldr tx, [state, #TX] // tx = state.tx // 2
// Load mode.
mode .req r0
ldr mode, [state, #MODE] // mode = state.mode // 2
// TX?
lsr tx, #1 // tx >>= 1 // 1
bcc direction_rx // if !carry: goto direction_rx // 1 thru, 3 taken
cmp mode, #MODE_RX // if mode == RX: // 1
beq direction_rx // goto direction_rx // 1 thru, 3 taken
direction_tx:

6
firmware/hackrf_usb/usb_api_transceiver.c
View File

@ -269,7 +269,7 @@ void transceiver_shutdown(void)
led_off(LED2);
led_off(LED3);
rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_OFF);
m0_state.tx = false;
m0_state.mode = M0_MODE_RX;
}
void transceiver_startup(const transceiver_mode_t mode) {
@ -282,13 +282,13 @@ void transceiver_startup(const transceiver_mode_t mode) {
led_off(LED3);
led_on(LED2);
rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_RX);
m0_state.tx = false;
m0_state.mode = M0_MODE_RX;
break;
case TRANSCEIVER_MODE_TX:
led_off(LED2);
led_on(LED3);
rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_TX);
m0_state.tx = true;
m0_state.mode = M0_MODE_TX;
break;
default:
break;

8
host/hackrf-tools/src/hackrf_debug.c
View File

@ -378,10 +378,16 @@ int write_register(hackrf_device* device, uint8_t part,
}
static void print_state(hackrf_m0_state *state) {
const char *mode_names[] = {"RX", "TX"};
const uint32_t num_modes = sizeof(mode_names) / sizeof(mode_names[0]);
printf("M0 state:\n");
printf("Mode: %u (%s)\n",
state->mode,
state->mode < num_modes ?
mode_names[state->mode] :
"UNKNOWN");
printf("M0 count: %u bytes\n", state->m0_count);
printf("M4 count: %u bytes\n", state->m4_count);
printf("TX: %u\n", state->tx);
}
static void usage() {

4
host/libhackrf/src/hackrf.h
View File

@ -157,12 +157,12 @@ typedef struct {
/** State of the SGPIO loop running on the M0 core. */
typedef struct {
/** Operating mode. */
uint32_t mode;
/** Number of bytes transferred by the M0. */
uint32_t m0_count;
/** Number of bytes transferred by the M4. */
uint32_t m4_count;
/** TX flag. */
uint32_t tx;
} hackrf_m0_state;
struct hackrf_device_list {