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使用宏代替部分等价的寄存器操作
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@jim-kirisame
jim-kirisame committed Mar 16, 2020
1 parent 9cd9f88 commit bd61f2d
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Showing 2 changed files with 79 additions and 26 deletions.
2 changes: 2 additions & 0 deletions usb/compiler.h
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Original file line number Diff line number Diff line change
Expand Up @@ -220,6 +220,8 @@ extern void _nop(void);
*/
#else
#warning unrecognized compiler
#include <stdbool.h>

#define SBIT(name, addr, bit) volatile bool name
#define SFR(name, addr) volatile unsigned char name
#define SFRX(name, addr) volatile unsigned char name
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103 changes: 77 additions & 26 deletions usb/endpoints.c
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Original file line number Diff line number Diff line change
Expand Up @@ -64,13 +64,64 @@ static USB_SETUP_REQ SetupReqBuf; //暂存Setup包

static uint8_t ClassRequestHandler(PUSB_SETUP_REQ packet);

void nop() {}
/**
* 设置指定Endpoint的状态
*
* @param num: Endpoint号
* @param data: 指定DATA0或DATA1
* @param resp: 默认应答
**/
#define EP_SET(num, data, resp) (UEP##num##_CTRL = (data) | (resp))
#define EP_IN_RESP(num, resp) (UEP##num##_CTRL = UEP##num##_CTRL & (~MASK_UEP_T_RES) | (resp))
#define EP_OUT_RESP(num, resp) (UEP##num##_CTRL = UEP##num##_CTRL & (~MASK_UEP_R_RES) | ((resp) << 2))
/**
* 重置端点0的状态。
* SETUP/OUT ACK
* IN NAK
*/
#define EP0_RESET() EP_SET(0, 0, UEP_R_RES_ACK | UEP_T_RES_NAK)
/**
* 端点0响应状态包的Status，ACK
*/
#define EP0_DATA1_ACK() EP_SET(0, (bUEP_R_TOG | bUEP_T_TOG), (UEP_R_RES_ACK | UEP_T_RES_ACK))

/**
* 设置端点IN NAK
*/
#define EP_IN_NAK(num) (UEP##num##_CTRL = UEP##num##_CTRL & ~MASK_UEP_T_RES | UEP_T_RES_NAK)

/**
* 端点 IN 后续处理
* 清空发送长度，并设置NAK
*/
#define EP_IN_FINISH(num) \
UEP##num##_T_LEN = 0; \
EP_IN_NAK(num)

/**
* 设置端点 IN NAK 响应并反转 DATA
*/
#define EP_IN_NAK_TOG(num) (UEP##num##_CTRL = UEP##num##_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES) | UEP_T_RES_NAK)
/**
* 设置端点 OUT ACK 响应并反转 DATA
*/
#define EP_OUT_ACK_TOG(num) (UEP##num##_CTRL = UEP##num##_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES) | UEP_R_RES_ACK)
/**
* 设置端点 IN STALL 响应并反转 DATA
*/
#define EP_IN_STALL_TOG(num) (UEP##num##_CTRL = UEP##num##_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL)
/**
* 设置端点 OUT STALL 响应并反转 DATA
*/
#define EP_OUT_STALL_TOG(num) (UEP##num##_CTRL = UEP##num##_CTRL & (~bUEP_R_TOG) | UEP_R_RES_STALL)

/***/
void EP0_OUT()
{
switch (SetupReq) {
case USB_GET_DESCRIPTOR:
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK; // 准备下一控制传输
// 重置端点状态，等待下次传输
EP0_RESET();
break;
}
}
Expand All @@ -86,13 +137,13 @@ void EP0_IN()
UEP0_T_LEN = len;
UEP0_CTRL ^= bUEP_T_TOG; //同步标志位翻转
break;
case USB_SET_ADDRESS:
case USB_SET_ADDRESS: // 延迟设置USB设备的地址
USB_DEV_AD = USB_DEV_AD & bUDA_GP_BIT | SetupLen;
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
EP0_RESET();
break;
default:
UEP0_T_LEN = 0; //状态阶段完成中断或者是强制上传0长度数据包结束控制传输
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
EP0_RESET();
break;
}
}
Expand Down Expand Up @@ -149,22 +200,22 @@ void EP0_SETUP()
case USB_REQ_RECIP_ENDP: {
switch (UsbSetupBuf->wIndexL) {
case 0x83:
UEP3_CTRL = UEP3_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES) | UEP_T_RES_NAK;
EP_IN_NAK_TOG(3);
break;
case 0x82:
UEP2_CTRL = UEP2_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES) | UEP_T_RES_NAK;
EP_IN_NAK_TOG(2);
break;
case 0x81:
UEP1_CTRL = UEP1_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES) | UEP_T_RES_NAK;
EP_IN_NAK_TOG(1);
break;
case 0x03:
UEP3_CTRL = UEP3_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES) | UEP_R_RES_ACK;
EP_OUT_ACK_TOG(3);
break;
case 0x02:
UEP2_CTRL = UEP2_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES) | UEP_R_RES_ACK;
EP_OUT_ACK_TOG(2);
break;
case 0x01:
UEP1_CTRL = UEP1_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES) | UEP_R_RES_ACK;
EP_OUT_ACK_TOG(1);
break;
default:
len = 0xFF; // 不支持的端点
Expand All @@ -183,22 +234,23 @@ void EP0_SETUP()
case USB_SET_FEATURE: /* Set Feature */
{
switch (UsbSetupBuf->bRequestType & USB_REQ_RECIP_MASK) {
// 接口
case USB_REQ_RECIP_ENDP: {

if ((((uint16_t)UsbSetupBuf->wValueH << 8) | UsbSetupBuf->wValueL) == 0x00) {
// 接口的Value始终为0
if (!UsbSetupBuf->wValueH && !UsbSetupBuf->wValueL) {
// Zero, Interface endpoint
switch (((uint16_t)UsbSetupBuf->wIndexH << 8) | UsbSetupBuf->wIndexL) {
case 0x83:
UEP3_CTRL = UEP3_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL; /* 设置端点3 IN STALL */
EP_IN_STALL_TOG(3);
break;
case 0x82:
UEP2_CTRL = UEP2_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL; /* 设置端点2 IN STALL */
EP_IN_STALL_TOG(2);
break;
case 0x81:
UEP1_CTRL = UEP1_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL; /* 设置端点1 IN STALL */
EP_IN_STALL_TOG(1);
break;
case 0x02:
UEP2_CTRL = UEP2_CTRL & (~bUEP_R_TOG) | UEP_R_RES_STALL; /* 设置断点2 OUT STALL */
EP_OUT_STALL_TOG(2);
break;
default:
len = 0xFF; //操作失败
Expand All @@ -209,6 +261,7 @@ void EP0_SETUP()
}
break;
}
// 设备
case USB_REQ_RECIP_DEVICE: {
if ((((uint16_t)UsbSetupBuf->wValueH << 8) | UsbSetupBuf->wValueL) == 0x01) {
/*
Expand Down Expand Up @@ -253,35 +306,33 @@ void EP0_SETUP()

if (len == 0xff) {
SetupReq = 0xFF;
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_STALL | UEP_T_RES_STALL; //STALL
// 内部错误，返回STALL
EP_SET(0, bUEP_R_TOG | bUEP_T_TOG, UEP_R_RES_STALL | UEP_T_RES_STALL);
} else if (len <= DEFAULT_ENDP0_SIZE) //上传数据或者状态阶段返回0长度包
{
UEP0_T_LEN = len;
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK; //默认数据包是DATA1，返回应答ACK
EP0_DATA1_ACK(); // 使用DATA1响应数据，或响应SETUP包的status
} else {
UEP0_T_LEN = 0; //虽然尚未到状态阶段，但是提前预置上传0长度数据包以防主机提前进入状态阶段
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK; //默认数据包是DATA1,返回应答ACK
EP0_DATA1_ACK(); // 响应SETUP包的STATUS
}
}

void EP1_IN()
{
UEP1_T_LEN = 0; //预使用发送长度一定要清空
UEP1_CTRL = UEP1_CTRL & ~MASK_UEP_T_RES | UEP_T_RES_NAK; //默认应答NAK
EP_IN_FINISH(1);
usb_busy = false;
}

void EP2_IN()
{
UEP2_T_LEN = 0; //预使用发送长度一定要清空
UEP2_CTRL = UEP2_CTRL & ~MASK_UEP_T_RES | UEP_T_RES_NAK; //默认应答NAK
EP_IN_FINISH(2);
usb_busy = false;
}

void EP3_IN()
{
UEP3_T_LEN = 0; //预使用发送长度一定要清空
UEP3_CTRL = UEP3_CTRL & ~MASK_UEP_T_RES | UEP_T_RES_NAK; //默认应答NAK
EP_IN_FINISH(3);
usb_busy = false;
}

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