2 #include <msp430xgeneric.h>
14 #include "bluetooth_init_cc256x.h"
17 static char bt_rx_buf[BT_RX_MAX_SIZE];
18 static unsigned char bt_rx_buf_wpos = 0;
19 static unsigned char bt_rx_buf_rpos = 0;
20 static uint8_t mw_bt_enabled = 0;
22 const unsigned char *mw_bt_get_rx_buf(unsigned char **rpos, unsigned char *len)
24 *rpos = &bt_rx_buf_rpos;
25 if (bt_rx_buf_rpos > bt_rx_buf_wpos)
26 *len = (BT_RX_MAX_SIZE - bt_rx_buf_rpos) + bt_rx_buf_wpos;
28 *len = bt_rx_buf_wpos - bt_rx_buf_rpos;
30 if (*len > (BT_RX_MAX_SIZE-(BT_RX_MAX_SIZE/10)))
31 BT_IO_POUT |= BT_IO_RTS; // low == ready, high == !ready
33 return (unsigned char *)bt_rx_buf;
36 #pragma vector=USCI_A1_VECTOR
37 __interrupt void UCA1_ISR (void)
41 /* wake up to handle the received char */
43 bt_rx_buf[bt_rx_buf_wpos++] = UCA1RXBUF;
46 bt_rx_buf_wpos %= BT_RX_MAX_SIZE;
47 _event_src |= BT_UART_RCV_EVENT;
56 void mw_init_bt_uart(const bt_uart_baud_t baud)
59 UCA1CTL1 |= UCSSEL__SMCLK;
61 case BT_UART_BD115200:
64 UCA1MCTL = UCBRS_7 + UCBRF_0;
68 UCA1CTL0 = UCMODE_0; // UART mode
69 UCA1CTL0 &= ~UC7BIT; // 8bit char
72 /* clear interrup flags */
77 #if 0 // Does never finish, presumably trigger does not trigger, unknown :(
78 void mw_bt_uart_tx(const void *buf, const unsigned int len)
82 DMACTL0 = DMA0TSEL_21;
84 DMA0DA = (unsigned int) &UCA1TXBUF;
85 DMA0SA = (uint32_t) buf;
89 DMA0CTL = DMADT_1 | DMASRCINCR_3 | DMASBDB | DMALEVEL | DMAIE;
93 while ((DMA0CTL & DMAIFG) == 0 && (DMA0CTL & DMAABORT) == 0)
97 void mw_bt_uart_tx(const void *buf, const unsigned int len)
103 // debug_uart_tx("BT tx: ");
105 while ((BT_IO_PIN & BT_IO_CTS)) // wait for CTS to go low
108 UCA1TXBUF = *(unsigned char *) (buf+pos);
109 // debug_uart_tx_char(*(unsigned char *) (buf+pos));
110 // snprintf(txstr, 8, "0x%02x ", *(unsigned char *) (buf+pos));
111 // debug_uart_tx(txstr);
113 while ((UCA1IFG & UCTXIFG) == 0)
116 while (UCA1STAT & UCBUSY)
118 // debug_uart_tx("\n");
122 static void load_cc256x_init_script(void)
128 while (pos < cc256x_init_script_size) {
131 tptr = (unsigned char *)(cc256x_init_script + pos);
132 mw_bt_uart_tx(tptr, 4 + tptr[3]);
134 // each init script part is one HCI command so wait for reply
140 void mw_enable_bt(void)
144 /* make sure it resets */
147 /* enable 32kHz ACLK output to BT module */
151 // wait for clock to stabilize
152 __delay_cycles(16000);
154 BT_IO_PDIR &= ~(BT_IO_CTS | BT_IO_PIN1 | BT_IO_PIN2 | BT_IO_CLKREQ);
155 BT_IO_PDIR |= BT_IO_RTS;
156 BT_IO_POUT &= ~(BT_IO_CTS | BT_IO_PIN1 | BT_IO_PIN2 | BT_IO_CLKREQ);
157 BT_IO_POUT &= ~BT_IO_RTS; // low == ready, high == !ready
159 /* setup UART pins */
160 BT_UART_PSEL |= BT_UART_TX_PIN | BT_UART_RX_PIN;
161 // P5OUT |= BT_UART_TX_PIN | BT_UART_RX_PIN;
162 // P5REN |= BT_UART_TX_PIN | BT_UART_RX_PIN;
164 mw_init_bt_uart(BT_UART_BD115200);
166 /* release BT reset pin */
169 for (i=0; i<1000; i++) {
170 __delay_cycles(16000);
171 if ((BT_IO_PIN & BT_IO_CTS) == 0) // when CTS goes low module is ready
175 debug_uart_tx("Timeout waiting for CC256x to lower CTS\n");
177 debug_uart_tx("CC256x CTS low - uploading init\n");
178 for (i=0; i<100; i++) {
179 __delay_cycles(16000); // give it some more before anyone sends data
181 load_cc256x_init_script();
182 debug_uart_tx("init uploaded\n");
191 void mw_disable_bt(void)
195 /* disable UART RX interrupt */
198 /* disable UART pins */
199 BT_UART_PSEL &= ~(BT_UART_TX_PIN | BT_UART_RX_PIN);
201 /* set BT reset pin */
204 /* disable 32kHz ACLK output to BT module */
208 /* make all I/O Pins inputs so we do not drive against a "deaf" module */
209 BT_IO_PDIR &= ~(BT_IO_RTS | BT_IO_CTS | BT_IO_PIN1 | BT_IO_PIN2 | BT_IO_CLKREQ);
210 BT_IO_POUT &= ~(BT_IO_RTS | BT_IO_CTS | BT_IO_PIN1 | BT_IO_PIN2 | BT_IO_CLKREQ);
213 uint8_t mw_bt_is_enabled(void)
215 return mw_bt_enabled;