annotate src/cs/drivers/drv_app/rtc/rtc_task.c @ 629:3231dd9b38c1

armio.c: make GPIOs 8 & 13 outputs driving 1 on all "classic" targets Calypso GPIOs 8 & 13 are pinmuxed with MCUEN1 & MCUEN2, respectively, and on powerup these pins are MCUEN, i.e., outputs driving 1. TI's code for C-Sample and earlier turns them into GPIOs configured as outputs also driving 1 - so far, so good - but TI's code for BOARD 41 (which covers D-Sample, Leonardo and all real world Calypso devices derived from the latter) switches them from MCUEN to GPIOs, but then leaves them as inputs. Given that the hardware powerup state of these two pins is outputs driving 1, every Calypso board design MUST be compatible with such driving; typically these GPIO signals will be either unused and unconnected or connected as outputs driving some peripheral. Turning these pins into GPIO inputs will result in floating inputs on every reasonably-wired board, thus I am convinced that this configuration is nothing but a bug on the part of whoever wrote this code at TI. This floating input bug had already been fixed earlier for GTA modem and FCDEV3B targets; the present change makes the fix unconditional for all "classic" targets. The newly affected targets are D-Sample, Leonardo, Tango and GTM900.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 02 Jan 2020 05:38:26 +0000
parents 945cf7f506b2
children
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1 /**
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2 * @file rtc_task.c
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3 *
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4 * Coding of the main RTC function : rtc_core
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5 * This function loop in the process message function for waiting messages.
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6 *
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7 * @author Laurent Sollier (l-sollier@ti.com)
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8 * @version 0.1
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9 */
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11 /*
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12 * History:
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13 *
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14 * Date Author Modification
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15 * ------------------------------------
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16 * 10/24/2001 L Sollier Create
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17 *
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18 *
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19 * (C) Copyright 2001 by Texas Instruments Incorporated, All Rights Reserved
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20 */
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21
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22 #include "rtc/rtc_env.h"
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23
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24 #include "rv/rv_general.h"
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25 #include "rvf/rvf_api.h"
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26 #include "rvm/rvm_use_id_list.h"
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28 #define RTC_MAILBOX_USED RVF_TASK_MBOX_0
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30 /* External declaration until Riviera 1.6 is available*/
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31 extern UINT8 rtc_handle_msg(T_RV_HDR* msg_p);
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34
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35 /**
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36 * @name Functions implementation
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37 *
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38 */
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39 /*@{*/
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40
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41 /**
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42 * function: rtc_core
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43 */
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44 T_RV_RET rtc_core(void)
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45 {
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46 BOOLEAN error_occured = FALSE;
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47 T_RV_HDR * msg_ptr;
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48 UINT16 received_event;
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49
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50 rvf_send_trace("RTC: Initialization", 19, NULL_PARAM, RV_TRACE_LEVEL_DEBUG_HIGH, RTC_USE_ID );
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51
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52 /* loop to process messages */
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53 while (error_occured == FALSE)
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54 {
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55 /* Wait for the necessary events. */
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56 received_event = rvf_wait ( 0xffff,0);
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57
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58 if (received_event & RVF_TASK_MBOX_0_EVT_MASK)
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59 {
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60 /* Read the message */
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61 msg_ptr = (T_RV_HDR *) rvf_read_mbox(RTC_MAILBOX_USED);
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62
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63 rtc_handle_msg(msg_ptr);
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64 }
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65 }
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66
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67 return RV_OK;
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68 }