add tuh_max3421_reg_read(), tuh_max3421_reg_read() for application usage

added max3241 for feather m4 and tested

2 files changed, 40 insertions, 5 deletions

diff --git a/hw/bsp/samd51/boards/feather_m4_express/board.h b/hw/bsp/samd51/boards/feather_m4_express/board.h
index 4629643fd..474163c06 100644
--- a/hw/bsp/samd51/boards/feather_m4_express/board.h
+++ b/hw/bsp/samd51/boards/feather_m4_express/board.h
@@ -31,6 +31,8 @@
  extern "C" {
 #endif
 
+#define _PINNUM(port, pin)    ((port)*32 + (pin))
+
 // LED
 #define LED_PIN               23
 #define LED_STATE_ON          1
@@ -43,6 +45,21 @@
 #define UART_TX_PIN           (32 + 17)
 #define UART_RX_PIN           (32 + 16)
 
+// SPI for USB host shield
+#define MAX3421_SERCOM_ID       1  // SERCOM2
+#define MAX3421_SERCOM_FUNCTION 2  // function C
+
+#define MAX3421_SCK_PIN         _PINNUM(0, 17)
+#define MAX3421_MOSI_PIN        _PINNUM(1, 23)
+#define MAX3421_MISO_PIN        _PINNUM(1, 22)
+#define MAX3421_TX_PAD          2 // MOSI = PAD_3, SCK = PAD_1
+#define MAX3421_RX_PAD          2 // MISO = PAD_2
+
+#define MAX3421_CS_PIN          21 // D11
+
+#define MAX3421_INTR_PIN        20 // D10
+#define MAX3421_INTR_EIC_ID     4  // EIC4
+
 #ifdef __cplusplus
  }
 #endif
diff --git a/hw/bsp/samd51/family.c b/hw/bsp/samd51/family.c
index bca18e1a2..2a2aee982 100644
--- a/hw/bsp/samd51/family.c
+++ b/hw/bsp/samd51/family.c
@@ -76,12 +76,18 @@ void USB_3_Handler(void) {
 // Implementation
 //--------------------------------------------------------------------+
 
-#if CFG_TUH_ENABLED && defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421
+#if CFG_TUH_ENABLED && CFG_TUH_MAX3421
+
+// API to read MAX3421's register. Implemented by TinyUSB
+extern uint8_t tuh_max3421_reg_read(uint8_t rhport, uint8_t reg, bool in_isr);
+
+// API to write MAX3421's register. Implemented by TinyUSB
+extern bool tuh_max3421_reg_write(uint8_t rhport, uint8_t reg, uint8_t data, bool in_isr);
+
 #define MAX3421_SERCOM TU_XSTRCAT(SERCOM, MAX3421_SERCOM_ID)
 #define MAX3421_EIC_Handler TU_XSTRCAT3(EIC_, MAX3421_INTR_EIC_ID, _Handler)
 
 static void max3421_init(void);
-
 #endif
 
 void board_init(void) {
@@ -136,11 +142,23 @@ void board_init(void) {
   gpio_set_pin_function(PIN_PA24, PINMUX_PA24H_USB_DM);
   gpio_set_pin_function(PIN_PA25, PINMUX_PA25H_USB_DP);
 
-#if CFG_TUH_ENABLED && defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421
+#if CFG_TUH_ENABLED && CFG_TUH_MAX3421
   max3421_init();
 #endif
 }
 
+void board_init_after_tusb(void) {
+#if CFG_TUH_ENABLED && CFG_TUH_MAX3421
+  // FeatherWing MAX3421E use MAX3421E's GPIO0 for VBUS enable
+  enum {
+    IOPINS1_ADDR  = 20u << 3, // 0xA0
+  };
+
+  uint8_t rhport = 1;
+  tuh_max3421_reg_write(rhport, IOPINS1_ADDR, 0x01, false);
+#endif
+}
+
 //--------------------------------------------------------------------+
 // Board porting API
 //--------------------------------------------------------------------+
@@ -182,7 +200,7 @@ uint32_t board_millis(void) {
 //--------------------------------------------------------------------+
 // API: SPI transfer with MAX3421E, must be implemented by application
 //--------------------------------------------------------------------+
-#if CFG_TUH_ENABLED && defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421
+#if CFG_TUH_ENABLED && CFG_TUH_MAX3421
 
 static void max3421_init(void) {
   //------------- SPI Init -------------//
@@ -262,7 +280,7 @@ static void max3421_init(void) {
 
   // Enable the SPI module
   sercom->SPI.CTRLA.bit.ENABLE = 1;
-  while (sercom->SPI.SYNCBUSY.bit.ENABLE);
+  while (sercom->SPI.SYNCBUSY.bit.ENABLE) {}
 
   //------------- External Interrupt -------------//