📄 mac_csp_tx.lst
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63 #define RPT(c) (0xA0 | ((c) & 0x0F)) /* if condition is true jump to last label */
64 #define INT (0xB9) /* assert IRQ_CSP_INT interrupt */
65 #define INCY (0xBD) /* increment CSPY */
66 #define INCMAXY(m) (0xB0 | ((m) & 0x07)) /* increment CSPY but not above maximum value of 'm' */
67 #define DECY (0xBE) /* decrement CSPY */
68 #define DECZ (0xBF) /* decrement CSPZ */
69 #define RANDXY (0xBC) /* load the lower CSPY bits of CSPX with random value */
70
71 /* strobe processor command instructions */
72 #define SSTOP (0xDF) /* stop program execution */
73 #define SNOP (0xC0) /* no operation */
74 #define STXCALN (0xC1) /* enable and calibrate frequency synthesizer for TX */
75 #define SRXON (0xC2) /* turn on receiver */
76 #define STXON (0xC3) /* transmit after calibration */
77 #define STXONCCA (0xC4) /* transmit after calibration if CCA indicates clear channel */
78 #define SRFOFF (0xC5) /* turn off RX/TX */
79 #define SFLUSHRX (0xC6) /* flush receive FIFO */
80 #define SFLUSHTX (0xC7) /* flush transmit FIFO */
81 #define SACK (0xC8) /* send ACK frame */
82 #define SACKPEND (0xC9) /* send ACK frame with pending bit set */
83
84 /* conditions for use with instructions SKIP and RPT */
85 #define C_CCA_IS_VALID 0x00
86 #define C_SFD_IS_ACTIVE 0x01
87 #define C_CPU_CTRL_IS_ON 0x02
88 #define C_END_INSTR_MEM 0x03
89 #define C_CSPX_IS_ZERO 0x04
90 #define C_CSPY_IS_ZERO 0x05
91 #define C_CSPZ_IS_ZERO 0x06
92
93 /* negated conditions for use with instructions SKIP and RPT */
94 #define C_NEGATE(c) ((c) | 0x08)
95 #define C_CCA_IS_INVALID C_NEGATE(C_CCA_IS_VALID)
96 #define C_SFD_IS_INACTIVE C_NEGATE(C_SFD_IS_ACTIVE)
97 #define C_CPU_CTRL_IS_OFF C_NEGATE(C_CPU_CTRL_IS_ON)
98 #define C_NOT_END_INSTR_MEM C_NEGATE(C_END_INSTR_MEM)
99 #define C_CSPX_IS_NON_ZERO C_NEGATE(C_CSPX_IS_ZERO)
100 #define C_CSPY_IS_NON_ZERO C_NEGATE(C_CSPY_IS_ZERO)
101 #define C_CSPZ_IS_NON_ZERO C_NEGATE(C_CSPZ_IS_ZERO)
102
103 ///////////////////////////////////////////////////////////////////////////////////////
104 // REV_B_WORKAROUND : part of a workaround to help ameliorate chip bug #273.
105 // This bug could actually be the source of extant every-once-in-a-while problems.
106 // When Rev B is obsolete, delete these defines and all references to them.
107 // Compile errors should flag all related fixes.
108 #define __SNOP_SKIP__ 1
109 #define __SNOP__ SNOP
110 ///////////////////////////////////////////////////////////////////////////////////////
111
112
113 /* ------------------------------------------------------------------------------------------------
114 * Defines
115 * ------------------------------------------------------------------------------------------------
116 */
117
118 /* CSPY return values from CSP program */
119 #define CSPY_RXTX_COLLISION 0
120 #define CSPY_NO_RXTX_COLLISION 1
121
122 /* CSPZ return values from CSP program */
123 #define CSPZ_CODE_TX_DONE 0
124 #define CSPZ_CODE_CHANNEL_BUSY 1
125 #define CSPZ_CODE_TX_ACK_TIME_OUT 2
126
127
128 /* ------------------------------------------------------------------------------------------------
129 * Macros
130 * ------------------------------------------------------------------------------------------------
131 */
132 #define CSP_STOP_AND_CLEAR_PROGRAM() st( RFST = ISSTOP; )
133 #define CSP_START_PROGRAM() st( RFST = ISSTART; )
134 ////////////////////////////////////////////////////////////////////////////////////////////////////
135 // REV_B_WORKAROUND : workaround for chip bug #574, delete this whole mess when Rev B is obsolete.
136 // Compile errors will flag all instances of macro call. Delete those too.
137 #ifndef _REMOVE_REV_B_WORKAROUNDS
138 #define __FIX_T2CMP_BUG__() st( if (T2CMP == 0) { T2CMP = 1;} )
139 #else
140 #define __FIX_T2CMP_BUG__()
141 #endif
142 ////////////////////////////////////////////////////////////////////////////////////////////////////
143
144 /*
145 * These macros improve readability of using T2CMP in conjunction with WEVENT.
146 *
147 * The timer2 compare, T2CMP, only compares one byte of the 16-bit timer register.
148 * It is configurable and has been set to compare against the upper byte of the timer value.
149 * The CSP instruction WEVENT waits for the timer value to be greater than or equal
150 * the value of T2CMP.
151 *
152 * Reading the timer value is done by reading the low byte first. This latches the
153 * high byte. A trick with the ternary operator is used by a macro below to force a
154 * read of the low byte when returning the value of the high byte.
155 *
156 * CSP_WEVENT_SET_TRIGGER_NOW() - sets the WEVENT trigger point at the current timer count
157 * CSP_WEVENT_SET_TRIGGER_SYMBOLS(x) - sets the WEVENT trigger point in symbols
158 * CSP_WEVENT_READ_COUNT_SYMBOLS() - reads the current timer count in symbols
159 */
160 #define T2THD_TICKS_PER_SYMBOL (MAC_RADIO_TIMER_TICKS_PER_SYMBOL() >> 8)
161
162 #define CSP_WEVENT_SET_TRIGGER_NOW() st( uint8 temp=T2TLD; T2CMP = T2THD; __FIX_T2CMP_BUG__(); )
163 #define CSP_WEVENT_SET_TRIGGER_SYMBOLS(x) st( MAC_ASSERT(x <= MAC_A_UNIT_BACKOFF_PERIOD); \
164 T2CMP = (x) * T2THD_TICKS_PER_SYMBOL; \
165 __FIX_T2CMP_BUG__(); )
166 #define CSP_WEVENT_READ_COUNT_SYMBOLS() (((T2TLD) ? T2THD : T2THD) / T2THD_TICKS_PER_SYMBOL)
167
168 /*
169 * Number of bits used for aligning a slotted transmit to the backoff count (plus
170 * derived values). There are restrictions on this value. Compile time integrity
171 * checks will catch an illegal setting of this value. A full explanation accompanies
172 * this compile time check (see bottom of this file).
173 */
174 #define SLOTTED_TX_MAX_BACKOFF_COUNTDOWN_NUM_BITS 4
175 #define SLOTTED_TX_MAX_BACKOFF_COUNTDOWN (1 << SLOTTED_TX_MAX_BACKOFF_COUNTDOWN_NUM_BITS)
176 #define SLOTTED_TX_BACKOFF_COUNT_ALIGN_BIT_MASK (SLOTTED_TX_MAX_BACKOFF_COUNTDOWN - 1)
177
178
179
180 /* ------------------------------------------------------------------------------------------------
181 * Local Programs
182 * ------------------------------------------------------------------------------------------------
183 */
184 static void cspPrepForTxProgram(void);
185
186
187 /**************************************************************************************************
188 * @fn macCspTxReset
189 *
190 * @brief Reset the CSP. Immediately halts any running program.
191 *
192 * @param none
193 *
194 * @return none
195 **************************************************************************************************
196 */
\ In segment BANKED_CODE, align 1, keep-with-next
197 void macCspTxReset(void)
\ macCspTxReset:
198 {
\ 000000 C082 PUSH DPL
\ 000002 C083 PUSH DPH
\ 000004 ; Saved register size: 2
\ 000004 ; Auto size: 0
199 MAC_MCU_CSP_STOP_DISABLE_INTERRUPT();
\ 000004 ; Setup parameters for call to function macMcuAndRFIM
\ 000004 79FD MOV R1,#-0x3
\ 000006 90.... MOV DPTR,#(macMcuAndRFIM & 0xffff)
\ 000009 74.. MOV A,#((macMcuAndRFIM >> 16) & 0xff)
\ 00000B 12.... LCALL ?BCALL ; Banked call to: DPTR()
200 MAC_MCU_CSP_INT_DISABLE_INTERRUPT();
\ 00000E ; Setup parameters for call to function macMcuAndRFIM
\ 00000E 79FE MOV R1,#-0x2
\ 000010 REQUIRE ?Subroutine1
\ 000010 ; // Fall through to label ?Subroutine1
201 CSP_STOP_AND_CLEAR_PROGRAM();
202 }
\ In segment BANKED_CODE, align 1, keep-with-next
\ ?Subroutine1:
\ 000000 74.. MOV A,#((macMcuAndRFIM >> 16) & 0xff)
\ 000002 12.... LCALL ?BCALL ; Banked call to: DPTR()
\ 000005 75E1FF MOV 0xe1,#-0x1
\ 000008 02.... LJMP ??Subroutine0_1 & 0xFFFF
\ In segment BANKED_CODE, align 1, keep-with-next
\ ?Subroutine0:
\ 000000 75E120 MOV 0xe1,#0x20
\ 000003 75E1DF MOV 0xe1,#-0x21
\ 000006 75E1C0 MOV 0xe1,#-0x40
\ ??Subroutine0_0:
\ 000009 75E1C3 MOV 0xe1,#-0x3d
\ 00000C 75E139 MOV 0xe1,#0x39
\ 00000F 75E101 MOV 0xe1,#0x1
\ 000012 75E1BE MOV 0xe1,#-0x42
\ 000015 75E1C0 MOV 0xe1,#-0x40
\ 000018 75E109 MOV 0xe1,#0x9
\ 00001B 75E1B9 MOV 0xe1,#-0x47
\ 00001E 75E101 MOV 0xe1,#0x1
\ 000021 75E1BF MOV 0xe1,#-0x41
\ ??Subroutine0_1:
\ 000024 D083 POP DPH
\ 000026 D082 POP DPL
\ 000028 02.... LJMP ?BRET
203
204
205 /*=================================================================================================
206 * @fn cspPrepForTxProgram
207 *
208 * @brief Prepare and initialize for transmit CSP program.
209 * Call *before* loading the CSP program!
210 *
211 * @param none
212 *
213 * @return none
214 *=================================================================================================
215 */
\ In segment BANKED_CODE, align 1, keep-with-next
216 static void cspPrepForTxProgram(void)
\ ??cspPrepForTxProgram:
217 {
\ 000000 C082 PUSH DPL
\ 000002 C083 PUSH DPH
\ 000004 ; Saved register size: 2
\ 000004 ; Auto size: 0
218 MAC_ASSERT(!(RFIM & IM_CSP_STOP)); /* already an active CSP program */
\ 000004 E591 MOV A,0x91
\ 000006 A2E1 MOV C,0xE0 /* A */.1
\ 000008 5008 JNC ??cspPrepForTxProgram_1
\ 00000A ; Setup parameters for call to function halAssertHandler
\ 00000A 90.... MOV DPTR,#(halAssertHandler & 0xffff)
\ 00000D 74.. MOV A,#((halAssertHandler >> 16) & 0xff)
\ 00000F 12.... LCALL ?BCALL ; Banked call to: DPTR()
219
220 /* set up parameters for CSP transmit program */
221 CSPY = CSPY_NO_RXTX_COLLISION;
\ ??cspPrepForTxProgram_1:
\ 000012 7401 MOV A,#0x1
\ 000014 90DF13 MOV DPTR,#-0x20ed
\ 000017 F0 MOVX @DPTR,A
222 CSPZ = CSPZ_CODE_CHANNEL_BUSY;
\ 000018 90DF14 MOV DPTR,#-0x20ec
\ 00001B F0 MOVX @DPTR,A
223
224 /* clear the currently loaded CSP, this generates a stop interrupt which must be cleared */
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