This code is inspired by JeanDo ostc-companion.
Signed-off-by: Anton Lundin glance@acc.umu.se --- src/hw_ostc3.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-)
diff --git a/src/hw_ostc3.c b/src/hw_ostc3.c index 7fa38f8..4d6bf83 100644 --- a/src/hw_ostc3.c +++ b/src/hw_ostc3.c @@ -50,6 +50,7 @@ #define RB_LOGBOOK_SIZE 256 #define RB_LOGBOOK_COUNT 256
+#define S_READY 0x4C #define READY 0x4D #define HEADER 0x61 #define CLOCK 0x62 @@ -71,6 +72,7 @@ typedef struct hw_ostc3_device_t { NONE, OPEN, DOWNLOAD, + SERVICE, } state; } hw_ostc3_device_t;
@@ -196,7 +198,7 @@ hw_ostc3_transfer (hw_ostc3_device_t *device, }
// Verify the ready byte. - if (ready[0] != READY) { + if (!(ready[0] == READY || ready[0] == S_READY)) { ERROR (abstract->context, "Unexpected ready byte."); return DC_STATUS_PROTOCOL; } @@ -294,7 +296,7 @@ hw_ostc3_check_state_or_init(dc_device_t *abstract) if (device->state == OPEN) { if ((rc = hw_ostc3_device_init(abstract)) != DC_STATUS_SUCCESS) return rc; - } else if (device->state != DOWNLOAD) { + } else if (device->state != DOWNLOAD && device->state != SERVICE) { return DC_STATUS_INVALIDARGS; } return DC_STATUS_SUCCESS; @@ -826,3 +828,46 @@ hw_ostc3_firmware_readfile (hw_ostc3_firmware_t *firmware, dc_context_t *context
return DC_STATUS_SUCCESS; } + + +static dc_status_t +hw_ostc3_device_service_mode (dc_device_t *abstract) +{ + hw_ostc3_device_t *device = (hw_ostc3_device_t *) abstract; + unsigned char command[] = {0xAA, 0xAB, 0xCD, 0xEF}; + unsigned char output[5]; + dc_status_t rc; + int n; + + if (device->state != OPEN) + return DC_STATUS_INVALIDARGS; + + // We cant use hw_ostc3_transfer here, due to the different echos + n = serial_write (device->port, command, sizeof (command)); + if (n != sizeof (command)) { + ERROR (abstract->context, "Failed to send the command."); + return EXITCODE (n); + } + + // Give the device some time to enter service mode + serial_sleep(device->port, 100); + + // Read the response + n = serial_read (device->port, output, sizeof (output)); + if (n != sizeof (output)) { + ERROR (abstract->context, "Failed to receive the echo."); + return EXITCODE (n); + } + + // Verify the response to service mode + if (output[0] != 0x4B || output[1] != 0xAB || + output[2] != 0xCD || output[3] != 0xEF || + output[4] != S_READY) { + ERROR (abstract->context, "Failed to verify echo."); + return DC_STATUS_IO; + } + + device->state = SERVICE; + + return DC_STATUS_SUCCESS; +}