Change in osmo-ccid-firmware[master]: cuart: allow getting the icc baud rate and clock freq

[Hoernchen]

Hoernchen has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ccid-firmware/+/16290 )


Change subject: cuart: allow getting the icc baud rate and clock freq
......................................................................

cuart: allow getting the icc baud rate and clock freq

Change-Id: I577907e6c60582a80666d43b17c20de4e03cc8df
---
M ccid_common/cuart.h
M sysmoOCTSIM/cuart_driver_asf4_usart_async.c
2 files changed, 12 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ccid-firmware refs/changes/90/16290/1

diff --git a/ccid_common/cuart.h b/ccid_common/cuart.h
index c72b51c..6a782db 100644
--- a/ccid_common/cuart.h
+++ b/ccid_common/cuart.h
@@ -30,6 +30,8 @@
 	CUART_CTL_RST,		/* enable/disable ICC reset */
 	CUART_CTL_WTIME,	/* set the waiting time (in etu) */
 	CUART_CTL_SET_FD,
+	CUART_CTL_GET_BAUDRATE,
+	CUART_CTL_GET_CLOCK_FREQ,
 };
 
 struct card_uart;
@@ -100,6 +102,7 @@
 			uint8_t slot_nr;
 			/* in us, required, no delay breaks _rx_ */
 			uint32_t extrawait_after_rx;
+			uint32_t current_baudrate;
 		} asf4;
 	} u;
 };
diff --git a/sysmoOCTSIM/cuart_driver_asf4_usart_async.c b/sysmoOCTSIM/cuart_driver_asf4_usart_async.c
index db3dc79..f12ed73 100644
--- a/sysmoOCTSIM/cuart_driver_asf4_usart_async.c
+++ b/sysmoOCTSIM/cuart_driver_asf4_usart_async.c
@@ -203,6 +203,9 @@
 	if (NULL == slot) {
 		return false;
 	}
+
+	// update cached values
+	cuart->u.asf4.current_baudrate = baudrate;
 	printf("(%u) switching SERCOM clock to GCLK%u (freq = %lu kHz) and baud rate to %lu bps (baud = %u)\r\n", slotnr, (best + 1) * 2, (uint32_t)(round(sercom_glck_freqs[best] / 1000)), baudrate, bauds[best]);
 	while (!usart_async_is_tx_empty(slot)); // wait for transmission to complete (WARNING no timeout)
 	usart_async_disable(slot); // disable SERCOM peripheral
@@ -404,6 +407,12 @@
 		uint32_t baudrate = (20e6/divider)/arg;
 		cuart->u.asf4.extrawait_after_rx = 1./baudrate * 1000 * 1000;
 		slot_set_baudrate(cuart->u.asf4.slot_nr, baudrate);
+	case CUART_CTL_GET_BAUDRATE:
+		return cuart->u.asf4.current_baudrate;
+		break;
+	case CUART_CTL_GET_CLOCK_FREQ:
+		ncn8025_get(cuart->u.asf4.slot_nr, &settings);
+		return 20e6 / ncn8025_div_val[settings.clkdiv];
 		break;
 	default:
 		return -EINVAL;

-- 
To view, visit https://gerrit.osmocom.org/c/osmo-ccid-firmware/+/16290
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Gerrit-Project: osmo-ccid-firmware
Gerrit-Branch: master
Gerrit-Change-Id: I577907e6c60582a80666d43b17c20de4e03cc8df
Gerrit-Change-Number: 16290
Gerrit-PatchSet: 1
Gerrit-Owner: Hoernchen <ewild at sysmocom.de>
Gerrit-MessageType: newchange
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