xref: /btstack/port/archive/msp430f5229lp-cc2564b/firmware/hal_usb.c (revision 1664436fd643daf66517dc309e6cc72448e8a86d) 
1 /**
2  * @file  hal_usb.c
3  *
4  * Copyright 2008 Texas Instruments, Inc.
5 ***************************************************************************/
6 #include  <msp430.h>
7 #include "hal_usb.h"
8 
9 /************************************************************************
10  * @brief  Initializes the serial communications peripheral and GPIO ports
11  *         to communicate with the TUSB3410.
12  *
13  * @param  none
14  *
15  * @return none
16  **************************************************************************/
halUsbInit(void)17 void halUsbInit(void)
18 {
19 
20   USB_PORT_SEL |= USB_PIN_RXD + USB_PIN_TXD;
21   USB_PORT_DIR |= USB_PIN_TXD;
22   USB_PORT_DIR &= ~USB_PIN_RXD;
23 
24   UCA1CTL1 |= UCSWRST;                          //Reset State
25   UCA1CTL0 = UCMODE_0;
26 
27   UCA1CTL0 &= ~UC7BIT;                      // 8bit char
28   UCA1CTL1 |= UCSSEL_2;
29 #if 0
30   // 57600 @ 16 Mhz
31   UCA1BR0 = 16;
32   UCA1BR1 = 1;
33 #else
34   // 115200 @ 16 Mhz
35   UCA1BR0 = 138;
36   UCA1BR1 = 0;
37 #endif
38   UCA1MCTL = 0xE;
39   UCA1CTL1 &= ~UCSWRST;
40 }
41 
42 /************************************************************************
43  * @brief  Disables the serial communications peripheral and clears the GPIO
44  *         settings used to communicate with the TUSB3410.
45  *
46  * @param  none
47  *
48  * @return none
49  **************************************************************************/
halUsbShutDown(void)50 void halUsbShutDown(void)
51 {
52   UCA1IE &= ~UCRXIE;
53   UCA1CTL1 = UCSWRST;                          //Reset State
54   USB_PORT_SEL &= ~( USB_PIN_RXD + USB_PIN_TXD );
55   USB_PORT_DIR |= USB_PIN_TXD;
56   USB_PORT_DIR |= USB_PIN_RXD;
57   USB_PORT_OUT &= ~(USB_PIN_TXD + USB_PIN_RXD);
58 }
59 
60 /************************************************************************
61  * @brief  Sends a character over UART to the TUSB3410.
62  *
63  * @param  character The character to be sent.
64  *
65  * @return none
66  **************************************************************************/
halUsbSendChar(char character)67 void halUsbSendChar(char character)
68 {
69   while (!(UCA1IFG & UCTXIFG));
70   UCA1TXBUF = character;
71 }
72 
halUsbRecvChar(void)73 char halUsbRecvChar(void){
74     while (!(UCA1IFG & UCRXIFG));
75     return UCA1RXBUF;
76 }
77 
78 /************************************************************************
79  * @brief  Sends a string of characters to the TUSB3410
80  *
81  * @param  string[] The array of characters to be transmit to the TUSB3410.
82  *
83  * @param  length   The length of the string.
84  *
85  * @return none
86  **************************************************************************/
halUsbSendString(char string[],unsigned char length)87 void halUsbSendString(char string[], unsigned char length)
88 {
89   volatile unsigned char i;
90   for (i=0; i < length; i++)
91     halUsbSendChar(string[i]);
92 }
93 
94 // provide putchar used by printf
putchar(int c)95 int putchar(int c){
96     halUsbSendChar(c);
97     return 1;
98 }