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main.c
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main.c
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/* --COPYRIGHT--,BSD
* Copyright (c) 2014, Texas Instruments Incorporated
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* --/COPYRIGHT--*/
/*
* ======== main.c ========
* Gamepad Demo:
*
* This example functions as a gamepad on the host. The gamepad has a HID report as described in
* report_desc_HID0 variable in descriptors.c. Please note that if this report structure is
* changed then the following lengths need to be updated -
* 1. #define report_desc_size_HID0 in descriptors.h needs to be updated with descriptor size
* 2. report_desc_size and report_len_input need t be uopdated in descriptors.c
* As is this demo will enumerate with 18 bytes of input report and 2 bytes of output report
* The input and output report structures for the gamepad as described in USB_gamepad.h
* The input reports are used to report ADC values and status of buttons (GPIO)
* The output report is used to set/reset indicators (GPIO)
*/
#include <string.h>
#include "driverlib.h"
#include "USB_config/descriptors.h"
#include "USB_API/USB_Common/device.h"
#include "USB_API/USB_Common/usb.h" // USB-specific functions
#include "USB_API/USB_HID_API/UsbHid.h"
#include "USB_app/USB_gamepad.h"
/*
* NOTE: Modify hal.h to select a specific device and board
*/
#include "hal.h"
/*********** Application specific globals **********************/
volatile uint8_t adcUpdateAvailable;
volatile USB_GamepadReportTx gamepadReportTx;
volatile USB_GamepadReportRx gamepadReportRx;
volatile uint8_t usbHidReportReceived;
volatile uint8_t usbHidReportSendComplete;
/*
* ======== main ========
*/
void main (void)
{
uint32_t current;
uint8_t update;
WDT_A_hold(WDT_A_BASE); // Stop watchdog timer
// Minumum Vcore setting required for the USB API is PMM_CORE_LEVEL_2 .
#ifndef DRIVERLIB_LEGACY_MODE
PMM_setVCore(PMM_CORE_LEVEL_2);
#else
PMM_setVCore(PMM_BASE, PMM_CORE_LEVEL_2);
#endif
// Init all GPIO ports as output to consume less current
initPorts();
// Init clocks for 8MHz operation
initClocks(8000000); // Config clocks. MCLK=SMCLK=FLL=8MHz; ACLK=REFO=32kHz
//Init Timer to trigger ADC every 10ms
initTimer();
//Init ADC to capture all analog channels
initADC();
//Init buttons as inputs with pull-ups
initButtons();
//Init indicators as output low
initIndicators();
//Init USB & events; if a host is present, connect
USB_setup(TRUE, TRUE);
//Enable global interrupts
__enable_interrupt();
while (1)
{
switch(USB_connectionState())
{
// This case is executed while your device is enumerated on the
// USB host
case ST_ENUM_ACTIVE:
update = 0;
current = buttonsPoll();
if (current != gamepadReportTx.buttons) {
gamepadReportTx.buttons = current;
update = 1;
}
if (adcUpdateAvailable) {
adcUpdateAvailable = false;
update = 1;
}
if (update) {
usbHidReportSendComplete = FALSE;
USBHID_sendReport((const uint8_t *)&gamepadReportTx, HID0_INTFNUM);
while(!usbHidReportSendComplete);
usbHidReportSendComplete = FALSE;
}
if (usbHidReportReceived) {
usbHidReportReceived = FALSE;
USBHID_receiveReport((uint8_t *)&gamepadReportRx, HID0_INTFNUM);
setIndicators();
}
break;
// These cases are executed while your device is disconnected from
// the host (meaning, not enumerated); enumerated but suspended
// by the host, or connected to a powered hub without a USB host
// present.
case ST_PHYS_DISCONNECTED:
case ST_ENUM_SUSPENDED:
case ST_PHYS_CONNECTED_NOENUM_SUSP:
__bis_SR_register(LPM3_bits + GIE);
_NOP();
break;
// The default is executed for the momentary state
// ST_ENUM_IN_PROGRESS. Usually, this state only last a few
// seconds. Be sure not to enter LPM3 in this state; USB
// communication is taking place here, and therefore the mode must
// be LPM0 or active-CPU.
case ST_ENUM_IN_PROGRESS:
default:;
}
} //while(1)
} //main()
/*
* ======== UNMI_ISR ========
*/
#if defined(__TI_COMPILER_VERSION__) || (__IAR_SYSTEMS_ICC__)
#pragma vector = UNMI_VECTOR
__interrupt void UNMI_ISR (void)
#elif defined(__GNUC__) && (__MSP430__)
void __attribute__ ((interrupt(UNMI_VECTOR))) UNMI_ISR (void)
#else
#error Compiler not found!
#endif
{
switch (__even_in_range(SYSUNIV, SYSUNIV_BUSIFG))
{
case SYSUNIV_NONE:
__no_operation();
break;
case SYSUNIV_NMIIFG:
__no_operation();
break;
case SYSUNIV_OFIFG:
#ifndef DRIVERLIB_LEGACY_MODE
UCS_clearFaultFlag(UCS_XT2OFFG);
UCS_clearFaultFlag(UCS_DCOFFG);
SFR_clearInterrupt(SFR_OSCILLATOR_FAULT_INTERRUPT);
#else
UCS_clearFaultFlag(UCS_BASE, UCS_XT2OFFG);
UCS_clearFaultFlag(UCS_BASE, UCS_DCOFFG);
SFR_clearInterrupt(SFR_BASE, SFR_OSCILLATOR_FAULT_INTERRUPT);
#endif
break;
case SYSUNIV_ACCVIFG:
__no_operation();
break;
case SYSUNIV_BUSIFG:
// If the CPU accesses USB memory while the USB module is
// suspended, a "bus error" can occur. This generates an NMI. If
// USB is automatically disconnecting in your software, set a
// breakpoint here and see if execution hits it. See the
// Programmer's Guide for more information.
SYSBERRIV = 0; //clear bus error flag
USB_disable(); //Disable
}
}
//Released_Version_4_10_02