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Updated firware to contain only 1 endpoint. Created a global data buffer to hold the ADC EP1 IN data. This increased performance from 7.5 KBps to 150+ KBps.

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This commit is contained in:
Mickey Malone
2021-02-10 07:26:40 -06:00
parent b1eb887656
commit 55de2de8c7
4 changed files with 56 additions and 98 deletions
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21
firmware/pico_rng.h
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@@ -38,8 +38,7 @@ struct usb_device_configuration {
#define EP0_IN_ADDR (USB_DIR_IN | 0)
#define EP0_OUT_ADDR (USB_DIR_OUT | 0)
#define EP1_OUT_ADDR (USB_DIR_OUT | 1)
#define EP2_IN_ADDR (USB_DIR_IN | 2)
#define EP1_IN_ADDR (USB_DIR_IN | 1)
// EP0 IN and OUT
static const struct usb_endpoint_descriptor ep0_out = {
@@ -83,26 +82,17 @@ static const struct usb_interface_descriptor interface_descriptor = {
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 2, // Interface has 2 endpoints
.bNumEndpoints = 1, // Interface has 1 endpoint
.bInterfaceClass = 0xef, // Miscellaneous device. See https://www.usb.org/defined-class-codes.
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = 0
};
static const struct usb_endpoint_descriptor ep1_out = {
static const struct usb_endpoint_descriptor ep1_in = {
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = EP1_OUT_ADDR, // EP number 1, OUT from host (rx to device)
.bmAttributes = USB_TRANSFER_TYPE_BULK,
.wMaxPacketSize = 64,
.bInterval = 0
};
static const struct usb_endpoint_descriptor ep2_in = {
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = EP2_IN_ADDR, // EP number 2, IN from host (tx from device)
.bEndpointAddress = EP1_IN_ADDR, // EP number 1, IN from host (tx from device)
.bmAttributes = USB_TRANSFER_TYPE_BULK,
.wMaxPacketSize = 64,
.bInterval = 0
@@ -113,8 +103,7 @@ static const struct usb_configuration_descriptor config_descriptor = {
.bDescriptorType = USB_DT_CONFIG,
.wTotalLength = (sizeof(config_descriptor) +
sizeof(interface_descriptor) +
sizeof(ep1_out) +
sizeof(ep2_in)),
sizeof(ep1_in)),
.bNumInterfaces = 1,
.bConfigurationValue = 1, // Configuration 1
.iConfiguration = 0, // No string