/*
**************************************************************************************************************
* INITIALIZE THE HOST CONTROLLER
*
* Description: This function initializes lpc17xx host controller
*
* Arguments : None
*
* Returns :
*
**************************************************************************************************************
*/
void Host_Init (void)
{
PRINT_Log("In Host_Init\n");
NVIC_DisableIRQ(USB_IRQn); /* Disable the USB interrupt source */
// turn on power for USB
LPC_SC->PCONP |= (1UL<<31);
// Enable USB host clock, port selection and AHB clock
LPC_USB->USBClkCtrl |= CLOCK_MASK;
// Wait for clocks to become available
while ((LPC_USB->USBClkSt & CLOCK_MASK) != CLOCK_MASK)
;
// it seems the bits[0:1] mean the following
// 0: U1=device, U2=host
// 1: U1=host, U2=host
// 2: reserved
// 3: U1=host, U2=device
// NB: this register is only available if OTG clock (aka "port select") is enabled!!
// since we don't care about port 2, set just bit 0 to 1 (U1=host)
LPC_USB->OTGStCtrl |= 1;
// now that we've configured the ports, we can turn off the portsel clock
LPC_USB->USBClkCtrl &= ~PORTSEL_CLK_EN;
// power pins are not connected on mbed, so we can skip them
/* P1[18] = USB_UP_LED, 01 */
/* P1[19] = /USB_PPWR, 10 */
/* P1[22] = USB_PWRD, 10 */
/* P1[27] = /USB_OVRCR, 10 */
/*LPC_PINCON->PINSEL3 &= ~((3<<4) | (3<<6) | (3<<12) | (3<<22));
LPC_PINCON->PINSEL3 |= ((1<<4)|(2<<6) | (2<<12) | (2<<22)); // 0x00802080
*/
// configure USB D+/D- pins
/* P0[29] = USB_D+, 01 */
/* P0[30] = USB_D-, 01 */
LPC_PINCON->PINSEL1 &= ~((3<<26) | (3<<28));
LPC_PINCON->PINSEL1 |= ((1<<26)|(1<<28)); // 0x14000000
PRINT_Log("Initializing Host Stack\n");
Hcca = (volatile HCCA *)(HostBuf+0x000);
TDHead = (volatile HCTD *)(HostBuf+0x100);
TDTail = (volatile HCTD *)(HostBuf+0x110);
EDCtrl = (volatile HCED *)(HostBuf+0x120);
EDBulkIn = (volatile HCED *)(HostBuf+0x130);
EDBulkOut = (volatile HCED *)(HostBuf+0x140);
TDBuffer = (volatile USB_INT08U *)(HostBuf+0x150);
/* Initialize all the TDs, EDs and HCCA to 0 */
Host_EDInit(EDCtrl);
Host_EDInit(EDBulkIn);
Host_EDInit(EDBulkOut);
Host_TDInit(TDHead);
Host_TDInit(TDTail);
Host_HCCAInit(Hcca);
Host_DelayMS(50); /* Wait 50 ms before apply reset */
LPC_USB->HcControl = 0; /* HARDWARE RESET */
LPC_USB->HcControlHeadED = 0; /* Initialize Control list head to Zero */
LPC_USB->HcBulkHeadED = 0; /* Initialize Bulk list head to Zero */
/* SOFTWARE RESET */
LPC_USB->HcCommandStatus = OR_CMD_STATUS_HCR;
LPC_USB->HcFmInterval = DEFAULT_FMINTERVAL; /* Write Fm Interval and Largest Data Packet Counter */
/* Put HC in operational state */
LPC_USB->HcControl = (LPC_USB->HcControl & (~OR_CONTROL_HCFS)) | OR_CONTROL_HC_OPER;
LPC_USB->HcRhStatus = OR_RH_STATUS_LPSC; /* Set Global Power */
LPC_USB->HcHCCA = (USB_INT32U)Hcca;
LPC_USB->HcInterruptStatus |= LPC_USB->HcInterruptStatus; /* Clear Interrrupt Status */
LPC_USB->HcInterruptEnable = OR_INTR_ENABLE_MIE |
OR_INTR_ENABLE_WDH |
OR_INTR_ENABLE_RHSC;
NVIC_SetPriority(USB_IRQn, 0); /* highest priority */
/* Enable the USB Interrupt */
NVIC_EnableIRQ(USB_IRQn);
PRINT_Log("Host Initialized\n");
}
void Host_Init (void)
{
USB_INT32U pinsel;
PCONP |= 0x80000000;
VICIntEnClr = (1 << 22); /* Enable the USB interrupt source */
OTG_CLK_CTRL = 0x00000009;
while ((OTG_CLK_STAT & 0x00000009) == 0) {
;
}
/* Set port func bits so that both U1 and U2 can be hosts. */
OTG_STAT_CTRL &= ~0x03;
OTG_STAT_CTRL |= 0x01;
/* P0[12] = USB_PPWR2 01 */
pinsel = PINSEL0;
pinsel &= 0xFCFFFFFF;
pinsel |= 0x01000000;
PINSEL0 = pinsel;
/* P0[29] = USB_D+1 */
/* P0[30] = USB_D-1 */
/* P0[31] = USB_D+2 */
pinsel = PINSEL1;
pinsel &= 0x03FFFFFF;
pinsel |= 0x54000000;
PINSEL1 = pinsel;
/* P1[19] = USB_PPWR1 10 */
/* P1[22] = USB_PWRD1 10 */
/* P1[27] = USB_OVRCR1 10 */
/* P1[31] = USB_OVRCR2 01 */
pinsel = PINSEL3;
pinsel &= 0x3F3FCF3F;
pinsel |= 0x40802080;
PINSEL3 = pinsel;
Hcca = (volatile HCCA *)(HOST_BASE_ADDR+0x000);
TDHead = (volatile HCTD *)(HOST_BASE_ADDR+0x100);
TDTail = (volatile HCTD *)(HOST_BASE_ADDR+0x110);
EDCtrl = (volatile HCED *)(HOST_BASE_ADDR+0x120);
EDIntIn = (volatile HCED *)(HOST_BASE_ADDR+0x130);
EDIntOut = (volatile HCED *)(HOST_BASE_ADDR+0x140);
TDBuffer = (volatile USB_INT08U *)(HOST_BASE_ADDR+0x150);
/* Initialize all the TDs, EDs and HCCA to 0 */
Host_EDInit(EDCtrl);
Host_EDInit(EDIntIn);
Host_EDInit(EDIntOut);
Host_TDInit(TDHead);
Host_TDInit(TDTail);
Host_HCCAInit(Hcca);
Host_DelayMS(50); /* Wait 50 ms before apply reset */
HcControl = 0; /* HARDWARE RESET */
HcControlHeadED = 0; /* Initialize Control list head to Zero */
HcPeriodCurrentED = 0;
/* SOFTWARE RESET */
HcCommandStatus = OR_CMD_STATUS_HCR;
HcFmInterval = DEFAULT_FMINTERVAL; /* Write Fm Interval and Largest Data Packet Counter */
HC_LS_THRHLD = 0x628;
/* Put HC in operational state */
HcControl = (HcControl & (~OR_CONTROL_HCFS)) | OR_CONTROL_HC_OPER;
HcRhStatus = OR_RH_STATUS_LPSC; /* Set Global Power */
HcHCCA = (USB_INT32U)Hcca;
HcInterruptStatus |= HcInterruptStatus; /* Clear Interrrupt Status */
/* Enable interrupts */
HcInterruptEnable = OR_INTR_ENABLE_MIE |
OR_INTR_ENABLE_WDH |
OR_INTR_ENABLE_RHSC |
OR_INTR_ENABLE_SO |
OR_INTR_ENABLE_RD |
OR_INTR_ENABLE_UE |
OR_INTR_ENABLE_FNO |
OR_INTR_ENABLE_OC;
VICIntSelect &= ~(1 << 22); /* Configure the ISR handler */
VICVectAddr22 = (USB_INT32U)Host_Isr; /* Set the vector address */
VICIntEnable = (1 << 22); /* Enable the USB interrupt source */
VICVectPriority22 &= 0xFFFFFFF0;
}