projects/nrfgo_sdk/bootloader_32k/firmware/usb.c File Reference

#include <Nordic\reg24lu1.h>
#include <intrins.h>
#include <stdbool.h>
#include "config.h"
#include "usb.h"

Go to the source code of this file.

Defines
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
Functions
void	usb_init (void)
void	usb_irq (void)
Variables
xdata volatile uint8_t out1buf[64]	_at_
_Bool	packet_received

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Detailed Description

Minimalistic USB code for the bootloader.

Definition in file usb.c.

---

Define Documentation

#define MIN	(		a,
			b
	)		((a) < (b) ? (a) : (b))

Leaves the minimum of the two arguments

Definition at line 30 of file usb.c.

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Function Documentation

void usb_init

(

void

)

Definition at line 98 of file usb.c.

{
    // Setup state information
    usb_state = DEFAULT;
    usb_bm_state = 0;

    // Setconfig configuration information
    usb_current_config = 0;
    usb_current_alt_interface = 0;
    
    // Disconnect from USB-bus since we are in this routine from a power on and not a soft reset:

    usbcs |= 0x08;
    delay_ms(50);
    usbcs &= ~0x08;

    usbien = 0x1d;
    in_ien = 0x01;
    in_irq = 0x1f;
    out_ien = 0x01;
    out_irq = 0x1f;

    // Setup the USB RAM with some OK default values:
    bout1addr = MAX_PACKET_SIZE_EP0/2;
    bout2addr = MAX_PACKET_SIZE_EP0/2 + USB_EP1_SIZE/2;
    bout3addr = MAX_PACKET_SIZE_EP0/2 + 2*USB_EP1_SIZE/2;
    bout4addr = MAX_PACKET_SIZE_EP0/2 + 3*USB_EP1_SIZE/2;
    bout5addr = MAX_PACKET_SIZE_EP0/2 + 4*USB_EP1_SIZE/2;
    binstaddr = 0xc0;
    bin1addr = MAX_PACKET_SIZE_EP0/2;
    bin2addr = MAX_PACKET_SIZE_EP0/2 + USB_EP1_SIZE/2;
    bin3addr = MAX_PACKET_SIZE_EP0/2 + 2*USB_EP1_SIZE/2;
    bin4addr = MAX_PACKET_SIZE_EP0/2 + 3*USB_EP1_SIZE/2;
    bin5addr = MAX_PACKET_SIZE_EP0/2 + 4*USB_EP1_SIZE/2;

    // Set all endpoints to not valid (except EP0IN and EP0OUT)
    inbulkval = 0x01;
    outbulkval = 0x01;
    inisoval = 0x00;
    outisoval = 0x00;

    in_ien |= 0x02;; 
    inbulkval |= 0x02;
    out_ien |= 0x02;
    outbulkval |= 0x02;
    out1bc = 0xff;
}

void usb_irq

(

void

)

Definition at line 369 of file usb.c.

{
    //
    // Split case into an if and a switch to force Keil into not using a library function:
    if (ivec == INT_USBRESET)
    {
        usbirq = 0x10;
        usb_state = DEFAULT;
        usb_current_config = 0;
        usb_current_alt_interface = 0;
        usb_bm_state = 0;
    }
    else
    {
        switch(ivec)
        {
            case INT_SUDAV:
                usbirq = 0x01;
                isr_sudav();
                break;
            case INT_SOF:
                usbirq = 0x02;
                break;
            case INT_SUTOK:
                usbirq = 0x04;
                packetizer_data_ptr = NULL;
                packetizer_data_size = 0;
                packetizer_pkt_size = 0;
                break;
            case INT_SUSPEND:
                usbirq = 0x08;
                break;
            case INT_EP0IN:
                in_irq = 0x01;
                packetizer_isr_ep0_in();
                break;
            case INT_EP0OUT:
                out_irq = 0x01;
                packetizer_data_size = 0;
                //        req.misc_data = out0buf;
                USB_EP0_HSNAK();
                break;
            case INT_EP1IN:
                // Clear interrupt 
                in_irq = 0x02;
                in1cs = 0x02;
                break;
            case INT_EP1OUT:
                // Clear interrupt
                out_irq = 0x02;     
                packet_received = true;
                out1bc = 0xff;
                break;
            default:
                break;
        }
    }
}

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Variable Documentation

xdata volatile uint8_t outisoval _at_

Definition at line 33 of file usb.c.

_Bool packet_received

Definition at line 79 of file usb.c.