[incubator-nuttx] branch master updated: esp32c3: Fix GPIO Output on pins 18 and 19 USB/JTAG

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new b8c33e5  esp32c3: Fix GPIO Output on pins 18 and 19 USB/JTAG
b8c33e5 is described below

commit b8c33e585eb299359649b0cf40917326782a450f
Author: Alan C. Assis <acas...@gmail.com>
AuthorDate: Tue Nov 9 11:17:38 2021 -0300

    esp32c3: Fix GPIO Output on pins 18 and 19 USB/JTAG
---
 arch/risc-v/src/esp32c3/esp32c3_gpio.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/risc-v/src/esp32c3/esp32c3_gpio.c 
b/arch/risc-v/src/esp32c3/esp32c3_gpio.c
index 920a466..e2200a4 100644
--- a/arch/risc-v/src/esp32c3/esp32c3_gpio.c
+++ b/arch/risc-v/src/esp32c3/esp32c3_gpio.c
@@ -38,10 +38,18 @@
 #include "esp32c3_irq.h"
 #include "hardware/esp32c3_iomux.h"
 #include "hardware/esp32c3_gpio.h"
+#include "hardware/esp32c3_usb_serial_jtag.h"
 
 #include "esp32c3_gpio.h"
 
 /****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define USB_JTAG_DM    18
+#define USB_JTAG_DP    19
+
+/****************************************************************************
  * Private Data
  ****************************************************************************/
 
@@ -128,6 +136,18 @@ int esp32c3_configgpio(int pin, gpio_pinattr_t attr)
   func  = 0;
   cntrl = 0;
 
+  /* If pin 18 or 19 then disable the USB/JTAG function and pull-up */
+
+  if ((pin == USB_JTAG_DM) || (pin == USB_JTAG_DP))
+    {
+      uint32_t regval;
+
+      regval = getreg32(USB_SERIAL_JTAG_CONF0_REG);
+      regval &= ~(USB_SERIAL_JTAG_USB_PAD_ENABLE |
+                  USB_SERIAL_JTAG_DP_PULLUP);
+      putreg32(regval, USB_SERIAL_JTAG_CONF0_REG);
+    }
+
   /* Handle input pins */
 
   if ((attr & INPUT) != 0)