Changeset 6ebf376b in rtems

Timestamp:

Feb 22, 2021, 3:39:59 PM (2 months ago)

Author:

Jan Sommer <jan.sommer@…>

Branches:

master

Children:

1eaf4e46

Parents:

f662420

git-author:

Jan Sommer <jan.sommer@…> (02/22/21 15:39:59)

git-committer:

Jan Sommer <jan.sommer@…> (03/05/21 18:06:25)

Message:

bsps/shared: Allow setting baud rate for zynq uart

File:

• bsps/shared/dev/serial/zynq-uart.c (modified) (3 diffs)

bsps/shared/dev/serial/zynq-uart.c

@@ -145 +145 @@
   zynq_uart_context *ctx = (zynq_uart_context *) context;
   volatile zynq_uart *regs = ctx->regs;
+  int32_t baud;
   uint32_t brgr = 0;
   uint32_t bauddiv = 0;
@@ -150 +151 @@
   int rc;
 
-  rc = zynq_cal_baud_rate(115200, &brgr, &bauddiv, regs->mode);
-  if (rc != 0)
-    return rc;
+  /*
+   * Determine the baud rate
+   */
+  baud = rtems_termios_baud_to_number(term->c_ospeed);
+
+  if (baud > 0) {
+    rc = zynq_cal_baud_rate(baud, &brgr, &bauddiv, regs->mode);
+    if (rc != 0)
+      return rc;
+  }
 
   /*
@@ -203 +211 @@
   regs->control &= ~(ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN);
   regs->mode = mode;
-  regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr);
-  regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv);
+  /* Ignore baud rate of B0. There are no modem control lines to de-assert */
+  if (baud > 0) {
+    regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr);
+    regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv);
+  }
   regs->control |= ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN;